Nothing matches all of those filters.
pH meters and probe care
Pens, sticks, test kits and storage fluid
Bluelab pH Pen – Waterproof 0-14 pH Meter
- pH range 0.0 to 14.0
- pH accuracy +/-0.1 at 25C
- Resolution 0.1 pH
- Temperature range 0 to 50C (32 to 122F)
- Temperature compensation automatic
- Calibration Manual, 2 or 3 point (pH 7.0, 4.0, 10.0), with 30...
- Display backlit LCD, selectable C or F
- Water resistance fully waterproof, floats in solution
- Power 1x AAA alkaline battery
- Warranty 1 year
- Measures pH and temperature
- Temperature accuracy ±1°C at 25°C
- Temperature resolution 1°C
- Auto power-off After 4 minutes
- Battery life 350 hours
- Minimum solution strength 0.2 EC and above
- Units pH, °C and °F
pH Test Kit – Drop Test Reagent for Nutrient Solution
- Brand Hydro Crop Shop
- Type Meters
- Price from £4.95
- Availability In stock
Grow Gadgets Hobby pH Pen – 0.1 Accuracy pH Meter
- Accuracy 0.1 pH
- Measures pH of nutrient solution
- Type handheld dip probe, pen format
- Use with soil, coco and hydroponic reservoirs
AC Infinity pH & Nutrient Meters – IP67 with Calibration
- Brand AC Infinity
- Type Meters
- Options 3 to choose from
- Price from £67.49
- Availability In stock
Aqua Master Tools S300 Pro2 Substrate pH/Temp Meter
- Measures pH and temperature, direct substrate insertion
- Electrode replaceable, BNC connector
- Waterproof yes
- Best suited to coco, rockwool, soil
- Measures Substrate pH and temperature
- pH range 0.0 to 14.0 pH
- Temperature range 0 to 50°C
- pH accuracy ±0.1 pH
- pH resolution 0.1 pH
- Temperature accuracy ±0.5°C
- Temperature resolution 0.1°C
- Calibration pH, 2 point automatic at 4.0 and 7.0
- Waterproof rating IP65 meter, IP67 electrode
- Auto power-off After 8 minutes
- Power 3 x 1.5 V AG-13 button cells, included
- Probe pH electrode on a 90 cm cord
- Auto temperature compensation 0 to 50°C
- Dimensions 220 x 40 x 40 mm
- Weight 158 g
VIVOSUN AeroLab P30 pH Pen – pH Tester for Hydroponics
- Model VSE-ALP30
- pH range 0.00–14.00
- Accuracy ±0.01 pH
- Temperature range 0–50°C (32–122°F), with ATC
- Calibration 1, 2 or 3 point automatic, NIST and USA buffers
- Probe replaceable double-junction pH electrode
- Protection IP67, floats
- Display backlit LCD, auto and manual hold
- Power 4 × AAA batteries (included)
- Size and weight approx. 19cm long, 118g
- In the box pH pen, calibration buffer sachets, measuring cup...
Out of stock
Digital pH Meter – For Hydroponics & Water
- Type Digital pH pen
- Range 0.0 – 14.0 pH
- Display LCD
- Controls ON/OFF, CAL
- Supplied with buffer powder sachets (pH 4.00, 6.86, 9.18), stor...
Bluelab pH PenPlus – pH Meter with Replaceable Probe
- Measures pH and temperature
- pH range 0.0-14.0, resolution 0.1, accuracy ±0.1 at 25°C
- Temperature range 0-50°C (32-122°F), resolution 1, accuracy ±1°C / ...
- Probe replaceable double-junction pH/temperature probe ...
- Calibration two-point, pH 7.0 and 4.0, 30-day reminder
- Operating environment solutions of 0.2 EC and above, 0-50°C
- Rating IP68 dustproof and waterproof
- Power 1x AAA alkaline battery, auto-off
- In the box pH PenPlus with probe, pH 7.0 and pH 4.0 calibrat...
- Warranty 2 years (6 months on the probe)
Grow Gadgets pH-Pro Meter – For Soil and Water Testing
- Type digital pH pen
- Use soil or nutrient solution
- Display digital LCD
- Power battery operated, with off button
Bluelab Multimedia pH Meter – Soil & Media pH Tester
- Measures pH only
- pH range 0.0-14.0, resolution 0.1, accuracy +/-0.1
- Probe Bluelab Leap pH probe, toughened spear tip, 2m cable
- Suitable media nutrient solution, soil, coco coir, rockwool, pot...
- Power 2 x AAA batteries
- Warranty 5-year meter, 6-month Leap probe
Aqua Master Tools P700 Pro 2 Replacement pH Electrode
- Compatible with Aqua Master Tools P700 Pro 2 Combo Meter
- Measures pH
- Waterproof rating IP67
- Type replaceable pH electrode, supplied on its own
Aqua Master Tools S300 Pro2 Replacement pH Electrode
- Compatible with Aqua Master Tools S300 Pro2 Substrate pH/Temp meter
- Connector BNC
- Waterproof rating IP67
- Measures pH (substrate, direct insertion)
Milwaukee pH51 Waterproof pH Meter – For Nutrient Solutions
- Type Handheld digital pH meter
- Range 0.0 to 14.0 pH
- Accuracy ±0.1 pH
- Calibration Manual, 1 or 2 point, via trimmers
- Protection Rating IP65 waterproof
- Battery 4 x button cell, included
- Battery Life Over 1500 hours of continuous use
- Electrode Replaceable double junction, MA73600
- Measures pH only
- pH range 0.0 to 14.0 pH
- pH accuracy ±0.1 pH at 25°C
- pH resolution 0.1 pH
- Calibration buffers pH 4.01, 7.01 and 10.01
- Waterproof rating IP65
- Display Large digital LCD
- Power 3 x 1.5 V alkaline, LR44 / A76, included
- Conditioning before first use Soak 2 hours in MA9015 storage solution
- Dimensions 165 x 30 x 30 mm
- Operating environment 0 to 50°C, up to 100 %RH
- Warranty 2 years, 6 months on the electrode
Aqualine pH Stick – Handheld Nutrient Solution pH Tester
- Brand Aqualine
- Type Meters
- Price from £63.49
- Availability In stock
Essentials pH Meter – Hydroponic Nutrient Solution Tester
- Range 0.0 to 14.0 pH
- Resolution 0.1 pH
- Accuracy +/- 0.2 pH
- Battery 4 x 1.5 V button cell
- Battery Life Approximately 150 hours continuous
- Auto Shut-off Approximately 15 minutes
- Product Life At least 365 tests
- Operating Temperature 0 °C to 50 °C
- Memory 10 readings
- Dimensions 170 x 32 x 15 mm
- Weight Approximately 70 g
Growth Technology pH Probe Refill & Storage Solution
- Brand Growth Technology
- Type Meters
- Price from £4.99
- Availability In stock
Growth Technology pH Probe Cleaner – Reconditioning Solution
- Brand Growth Technology
- Type Meters
- Price from £4.99
- Availability In stock
EC and nutrient strength
Truncheons, pens and combo meters
Bluelab Nutrient Truncheon – EC, CF & PPM Meter
- EC range 0.2 to 3.6
- CF range 2 to 36
- PPM (500 scale) 100 to 1800
- PPM (700 scale) 140 to 2520
- Accuracy +/-0.1 EC at 25C
- Calibration none required - factory calibrated
- Operating temperature 0 to 50C (32 to 122F)
- Readout automatic liquid detection with LED display
- Build fully waterproof, long-format probe
- Power 3x AA alkaline batteries
- Warranty 5 years
- Measures Nutrient conductivity in EC, CF and ppm
- CF accuracy ±1 CF at 25°C
- CF resolution 1 CF
- EC resolution 0.1 EC
- ppm 500 accuracy ±50 ppm at 25°C
- ppm 500 resolution 50 ppm
- ppm 700 accuracy ±70 ppm at 25°C
- ppm 700 resolution 70 ppm
- Display Blueglow light display
- Battery type 3 x AA standard or alkaline
- Auto on and off Automatic on liquid detection
- Temperature compensation Automatic
Aqua Master Tools E50 Pro Replacement EC Electrode
- Compatible with Aqua Master Tools E50 Pro EC & Temperature meter
- Waterproof rating IP67
- Measures EC
Out of stock
VIVOSUN pH and TDS Meter Combo – Hydroponic Water Test Kit
- pH range 0.00–14.00, ±0.1 pH
- TDS range 0–9999 ppm, 1 ppm resolution, ±5%
- EC range 0–9999 µS/cm, 1 µS/cm resolution, ±5%
- Temperature 0.1–80°C (32–176°F), 0.1° resolution
- Compensation ATC on both pens
- TDS pen power 1 × 3V CR2032 button cell
- In the box pH pen, TDS/EC/temperature pen, pH buffer powders
Milwaukee EC40 Nutrient Truncheon – EC Meter for Hydroponics
- Model Milwaukee EC40 EC/TDS Nutrient Meter
- Range 0.2 to 4.0 mS/cm | 2 to 40 CF | 100 to 2000 ppm (...
- Resolution 0.1 mS/cm (70 ppm on the 700 scale, 50 ppm on the...
- Accuracy ±4% of reading ±1 resolution point
- Calibration factory calibrated
- Temperature compensation automatic, 5 to 50 °C
- Display 20 blue LED bar
- Probe graphite EC sensor with built-in temperature sensor
- Protection IP67 waterproof, floating
- Power 3 x 1.5V AA alkaline (included); auto on/off; bat...
- Dimensions 420mm long x 30mm diameter; 255g with batteries
- Supplied with wrist strap
Milwaukee C66 Conductivity Pen – EC Tester for Hydroponics
- Model Milwaukee C66 Waterproof High Range Conductivity Pen
- Range 0.00 to 10.00 mS/cm
- Resolution 0.01 mS/cm
- Accuracy ±2% full scale
- Temperature compensation automatic, 5 to 50 °C (β = 2%/°C)
- Calibration manual, one point via trimmer (1413 µS/cm)
- Electrode MA73076, replaceable
- Protection IP65 waterproof
- Power 3 x 1.5V LR44 batteries (included), approx. 250 h...
- Dimensions approx. 165 x 30 x 30mm; approx. 100g
Essentials EC Meter – Nutrient Meter for Hydroponics
- Range 0.1 – 10.0 mS
- Resolution 0.1 mS
- Accuracy ±2% full scale
- Temperature compensation automatic, 0°C – 70°C
- Operating temperature 0°C – 50°C
- Memory 10 readings
- Battery 4 x 1.5V button cells, approx. 100 hours
- Auto shut-off approx. 15 minutes
- Dimensions 170 x 32 x 15mm
- Weight approx. 70g
Out of stock
Bluelab Commercial Truncheon Nutrient Meter – High Range EC
- EC 0.2-6.0, resolution 0.1, accuracy ±0.1 at 25°C
- CF 4-60, resolution 1, accuracy ±1
- ppm 500 (TDS) 200-3000, resolution 50, accuracy ±50
- ppm 700 280-4200, resolution 70, accuracy ±70
- Calibration none required - factory calibrated, automatic tem...
- Operating temperature 0-50°C (32-122°F)
- Display LED scale, automatic on when liquid is detected
- Build fully waterproof, long-format probe
- Power 3x AA alkaline batteries
- Warranty 5 years
Milwaukee Smart Combi Meter – pH & EC Meter Hydroponics
- pH meter range 0.0-14.0 pH
- EC meter range 0.0-10.0 mS/cm
Bluelab ORP Probe – Replacement ORP Sensor, 2m Cable
- Sensor platinum spiral electrode, ceramic double-junctio...
- Connector standard BNC
- Cable length 2 metres
- Body waterproof polycarbonate, 12mm x 122mm shaft
- Range ±2000 mV
- Operating environment 0.2 EC and above, -5°C to 80°C
- Includes KCl-filled storage cap
- Compatible with any meter or controller with a BNC ORP input, inc...
Bluelab ORP Meter – Handheld Water Quality Tester
- Measures ORP in mV; pH with an optional pH probe
- ORP range ±1000 mV
- pH range 0.0 to 14.0 pH
- Temperature range 0 to 50°C (32 to 122°F)
- ORP accuracy ±5 mV at 25°C
- ORP resolution 1 mV, 10 mV below 0 mV
- pH accuracy ±0.1 pH at 25°C
- pH resolution 0.1 pH
- Calibration reminder 30-day pH calibration indicator
- ORP calibration None required
- pH calibration Two or three point (7.0, 4.0, 10.0)
- Waterproof rating Not waterproof, withstands splashes
- Display Backlit LCD with low-battery indicator
- Power 2 x AAA alkaline batteries
- Probe cable length 2 m (6.6 ft)
- Probe connection Single BNC connector
- Warranty 5 years, 6 months on the ORP probe
Aqua Master Tools E300 Pro Substrate EC/Temp Meter
- Measures EC and temperature, direct substrate insertion
- Electrode replaceable
- Waterproof yes
- Best suited to coco, rockwool, soil
- Measures Substrate EC and temperature
- EC range 0.0 to 19.9 mS/cm
- Temperature range 0 to 50°C
- EC accuracy ±2% of full scale, 0.0 to 4 mS/cm
- EC resolution 0.1 mS/cm
- Temperature accuracy ±0.5°C
- Temperature resolution 0.1°C
- Calibration EC, 1 point automatic at 1.4 EC
- Waterproof rating IP65 meter, IP67 electrode
- Auto power-off After 8 minutes
- Power 3 x 1.5 V AG-13 button cells, included
- Probe EC electrode on a 90 cm cord
- Auto temperature compensation 0 to 50°C
- Dimensions 220 x 40 x 40 mm
- Weight 171 g
Aqua Master Tools P700 Pro 2 Combo Meter – pH, EC, CF, PPM
- pH range 0.0 - 14.0 (±0.1)
- EC range 0.0 - 19.9 mS/cm
- CF range 0.0 - 199
- PPM range 0 - 1999 (700 scale)
- Temperature range 0°C - 50°C
- Calibration pH 2-point auto (4.0-7.0), EC 1-point auto
- Power DC 6V rechargeable
- Dimensions 200 x 140 x 34mm, 418g
- Measures pH, EC, CF, ppm and temperature
- CF range 0.0 to 199 CF
- EC range 0.0 to 19.9 mS/cm
- pH range 0.0 to 14.0 pH
- ppm range 0 to 1999 ppm
- Temperature range 0 to 50°C
- EC accuracy ±2% of full scale
- pH accuracy ±0.1 pH
- ppm accuracy ±2% of full scale
- Resolution pH 0.1, EC 0.1 mS/cm, ppm 10 ppm
- Temperature accuracy ±0.5°C
- EC calibration 1 point automatic at 1.4, 3.0 or 12.88 EC
- pH calibration 2 point automatic at pH 4.0 and 7.0
- Waterproof rating IP65 meter, IP67 electrodes
- Display Large LED screen
- Power 6 V DC rechargeable battery
- Auto temperature compensation 0 to 50°C
- Dimensions 200 x 140 x 34 mm
- ppm scale 700 ppm
- Weight 418 g
Aqua Master Tools H600 Pro Handheld Meter – pH, EC, PPM, TDS
- pH range 0.1 - 14.0
- EC range 0.0 - 19.9 mS/cm
- TDS range 0.0 - 19.99 ppt
- PPM range 0 - 1999
- Temperature range 0°C - 50°C
- Calibration pH 2-point
- Power 9V battery, 8-minute auto shut-off
- Weight 430g
- Measures pH, EC, ppm, TDS and temperature
- EC range 0.0 to 19.9 mS/cm
- pH range 0.1 to 14.0 pH
- ppm range 0 to 1999 ppm
- TDS range 0.0 to 19.99 PPT
- Temperature range 0 to 50°C
- EC accuracy ±2% of full scale
- pH accuracy ±0.1 pH
- Resolution pH 0.1, EC 0.1 mS/cm, ppm 10 ppm
- TDS accuracy ±2% of full scale
- Temperature accuracy ±0.5°C
- Calibration reminder Clears after 30 days
- EC calibration 1 point automatic at EC 1.4 (1413 µS/cm)
- pH calibration 2 point automatic at pH 4.0 and 7.0
- Waterproof rating IP62 meter, IP67 electrodes
- Power 1 x 9 V battery, included
- Auto temperature compensation 0 to 50°C
- Dimensions 210 x 120 x 60 mm
- ppm scale 700 ppm
- Weight 430 g
Aqua Master Tools E300 Pro2 Replacement EC Electrode
- Compatible with Aqua Master Tools E300 Pro2 Substrate EC/Temp meter
- Waterproof rating IP67
- Measures EC (substrate, direct insertion)
Grow Gadgets EC Tester – Nutrient Strength Meter
- Brand Grow Gadgets
- Measurement type Electrical Conductivity (EC)
- Display Digital LCD screen
- Operation time Up to 700 hours
- Housing Tough plastic construction
- Included Carry case and calibration screwdriver
- Application Hydroponics, coco and soil growing
Water Conditioning Toolkit – pH & EC Control Kit
- EC meter Bluelab Truncheon Nutrient Meter V2
- pH testing Aqualine pH Stick
- pH adjustment Growth Technology pH Up and pH Down
- Water treatment Ecothrive Neutralise (chlorine and chloramine)
- Dosing 2ml, 10ml and 20ml syringes plus measuring jug
- Suitable for coco, soil and hydroponics
Bluelab EC Pen – Waterproof Nutrient Strength Meter
- Measures conductivity (nutrient strength)
- Units EC, CF, ppm 500 and ppm 700
- Temperature compensation automatic
- Calibration factory calibrated, optional user calibration
- Water resistance fully waterproof, floats
- Features hold reading and auto-off
- EC range 0.0 to 10.0 EC
- ppm 500 range 0 to 5,000 ppm 500 (TDS)
- ppm 700 range 0 to 7,000 ppm 700
- Temperature range 0 to 50°C (32 to 122°F)
- EC accuracy ±0.1 EC at 25°C
- EC resolution 0.1 EC
- ppm 500 accuracy ±50 ppm at 25°C
- ppm 700 accuracy ±70 ppm at 25°C
- ppm resolution 10 ppm
- Temperature accuracy ±1°C at 25°C
- Temperature resolution 1°C
- Display Backlit LCD
- Auto power-off After 4 minutes
- Battery life 350 hours
- Power 1 x AAA alkaline battery
Grow Gadgets Hobby EC Pen – Nutrient Strength Meter
- Measures electrical conductivity (EC) of nutrient solution
- Type handheld dip probe, pen format
- Use with hydro reservoirs, soil and coco run-off
Temperature, humidity and moisture
Readings from the air and from the substrate
Grow Tools Temperature & Humidity Meter – Hygrometer
- Measures temperature and relative humidity
- Display digital LCD
- Power battery powered
- Mounting free-standing or hanging
AC Infinity VPD Thermometer – Tent Climate Meter
- Type Standalone digital thermometer, hygrometer and VP...
- Readouts Temperature, relative humidity, VPD
- Connectivity None required, fully standalone
- Placement Canopy-height, hang or stand
- Measures Air and leaf VPD, temperature and humidity
- Emissivity range 0.1 to 1.00, adjustable
- Infrared surface temperature range -21 to 550°C (-5.8 to 1022°F)
- Humidity calibration ±10 %RH offset, 1% steps
- Leaf temperature calibration ±10°C offset, 1° steps
- Temperature calibration ±10°C offset, 1° steps
- Auto power-off After 20 seconds idle
- Power 2 x AAA batteries
- Default emissivity 0.98
- Distance-to-spot ratio 12
- Laser Class 2 laser positioning
- Memory Last 5 readings, saved automatically
- Model AC-TRV3
- Response time Under 500 ms
- Unit dimensions 151 x 103 x 45 mm
Aqua Master Tools E50 Pro EC & Temperature Pen Meter
- EC range 0.0 - 19.9 mS/cm
- Temperature range 0°C - 50°C (32°F - 122°F)
- EC resolution 0.1 mS/cm
- Temperature resolution 0.1°C (1.0°F)
- EC accuracy ± 2% F.S.
- Temperature accuracy ± 0.5°C
- Temperature compensation automatic, 0°C - 50°C
- Calibration EC 1-point auto at 1.4 EC
- Calibration indicator yes
- Low battery indicator yes
- Waterproof rating IP67
- Auto power-off after 8 minutes
- Power supply 3 x 1.5V AG-13 button cell (included)
- Electrode replaceable
- Dimensions 220 x 40 x 40 mm
- Weight 102 g
- Measures EC and temperature
- EC range 0.0 to 19.9 mS/cm
- Temperature range 0 to 50°C
- EC accuracy ±2% of full scale
- EC resolution 0.1 mS/cm
- Temperature accuracy ±0.5°C
- Temperature resolution 0.1°C
- Calibration EC, 1 point automatic at 1.4 EC
- Waterproof rating IP67
- Auto power-off After 8 minutes
- Power 3 x 1.5 V AG-13 button cells, included
- Auto temperature compensation 0 to 50°C
- Dimensions 220 x 40 x 40 mm
- Weight 102 g
Aqua Master Tools P50 Pro2 pH & Temperature Pen Meter
- pH range 0.0 - 14.0
- Temperature range 0°C - 50°C
- Calibration 2-point auto, 4.0 - 7.0 pH
- Waterproof rating IP67
- Auto power-off after 8 minutes
- Measures pH and temperature
- pH range 0.0 to 14.0 pH
- Temperature range 0 to 50°C
- pH accuracy ±0.1 pH
- pH resolution 0.1 or 0.01 pH, selectable
- Temperature accuracy ±1.0°C
- Temperature resolution 0.1°C
- Calibration pH, 2 point automatic at 4.0 and 7.0
- Calibration reminder Clears after 30 days
- Waterproof rating IP67
- Display Black display with white characters
- Auto power-off After 8 minutes
- Power 2 x 1.5 V AAA batteries, included
- Auto temperature compensation 0 to 50°C
- Dimensions 230 x 43 x 43 mm
- Weight 132 g
Grow Gadgets Digital Moisture Meter – For Soil and Coco
- Brand Grow Gadgets
- Measurement type Substrate moisture level
- Measurement range 5% to 40% saturation
- Display Clear digital display
- Power 9 volt battery (supplied)
- Included 9 volt battery and protective carry case
- Suitable for Soil, coco and other substrates
- Also used for Testing dried plant materials such as lavender or...
VIVOSUN Wireless Thermometer & Hygrometer Set
- Sensors 3 wireless sensors plus main display unit
- Readings Temperature and relative humidity
- Display Large LCD screen
- Signal range Reliable transmission through tent walls
- Power Battery operated (display and sensors)
- Use case Grow tents, grow rooms and outdoor reference
- Measures Temperature and relative humidity
- Humidity range 20 to 95 %RH
- Indoor temperature range -20 to 70°C (-4 to 158°F)
- Remote sensor temperature range -40 to 70°C (-40 to 158°F)
- Wireless range 60 m (197 ft)
- Humidity accuracy ±5 %RH
- Temperature accuracy ±1°C (±1.5°F)
- Temperature resolution 0.1°C
- Display power 2 x AAA 1.5 V
- Display readouts Indoor and remote temp, RH, trend, max/min
- Display type Touchscreen LCD
- Sensor power 2 x AAA 1.5 V per sensor
- Backlight Blue backlight, 12 second auto-off
- Mounting Tabletop, hanging or magnet
- Radio frequency 433 MHz
- Temperature units °C or °F selectable, °C by default
Triminator Moisture Meter – For Drying and Curing
- Function measures moisture content in produce
- Application drying and curing process monitoring
- Pairs with Triminator Dry Trimming Machine
- Availability special order - allow an additional 2 days to ship
- How it measures Conductance between two steel pins
- Measurement range 7 to 35 % moisture, over two scales
- Measures Moisture content of dried plant material
- High scale range 16 to 35 % moisture
- Low scale range 7 to 15 % moisture
- Accuracy ±1 LED
- Calibration Pins into cap holes, reads 20 % ±2 LED
- Display 10-LED bar graph
- Auto power-off None, switch off manually after use
- Battery indicator Bar graph shows charge at power-on
- Low battery alarm Below 7.5 V
- Power One 9 V battery, included
- Current draw Under 15 mA DC
- Dimensions 164 x 69 x 26 mm
- Operating temperature 0 to 60°C, below 80 %RH
- Pin length 10 mm (3/8 in)
- Storage temperature -5 to 60°C
- Weight 91 g
Bluelab Combo Meter – pH, EC & Temperature Tester
- Measures pH, conductivity and temperature
- pH range 0.0-14.0, resolution 0.1, accuracy +/-0.1
- Conductivity range 0.0-9.9 EC / 0-99 CF / ppm 500 (TDS) 0-4950 / ppm...
- Temperature range 0-50C (32-122F)
- Calibration 2-point pH (4.0 and 7.0) with 30-day reminder; co...
- Display backlit LCD
- Power 2 x AAA batteries
- Warranty 5-year meter (pH probe covered separately)
- CF accuracy ±1 CF at 25°C
- Conductivity accuracy ±0.1 EC at 25°C
- Conductivity resolution 0.1 EC
- ppm 500 accuracy ±50 ppm at 25°C
- ppm 700 accuracy ±70 ppm at 25°C
- ppm resolution 10 ppm
- Temperature accuracy ±1°C at 25°C
- Temperature resolution 1°C
- pH calibration points pH 7.0 then pH 4.0 or pH 10.0
- Waterproof rating Not waterproof, withstands splashes
- Temperature compensation Automatic
Bluelab Temperature Probe – Replacement for pH Controllers
- Measures solution temperature
- Compatible with Bluelab pH Controllers and Bluelab Pro Controllers
- Connector 3.5mm jack
- Cable length 2 metres (6.6 ft)
- Body stainless steel, waterproof
- Calibration none required
ETI Mini RayTemp Infrared Thermometer – Gun for Grow Rooms
- Type infrared, non-contact
- Range -50°C to +330°C
- Accuracy ±2°C
- Distance-to-spot ratio 12
- Sighting laser pointer
Marksman Wooden Thermometer – Indoor Grow Thermometer
- Scale -40°C to 50°C / -40°F to 120°F
- Display dual Celsius/Fahrenheit analogue scale
- Mount solid wood back, hanging hole
- Power none required
- Brand Marksman
Bluelab Pulse Multimedia EC/MC Meter – For Soil Moisture
- Measures moisture, conductivity (EC) and temperature
- EC range 0-15, accuracy +/-0.2 (0-5.0) or +/-8% (5.0-15.0)
- Moisture range 5%-70% (mixed media and coir), accuracy +/-5%
- Temperature range 5-40C (40-104F), accuracy +/-1C
- Probe length 200mm / 8 inch stainless steel
- Connectivity Bluetooth 4.0+, iOS 12.1+ and Android 5.1+
- Power 1 x AA battery
- Warranty 1 year
- Not suitable for perlite or rockwool
Bluelab Combo Meter Plus – pH, EC & Temperature Tester
- Measures pH, conductivity and temperature
- pH range 0.0-14.0, resolution 0.1, accuracy +/-0.1
- Conductivity range 0.0-9.9 EC / 0-99 CF / 0-4950 ppm 500 / 0-6930 pp...
- Temperature range 0-50C (32-122F)
- Probe Bluelab Leap pH probe, toughened spear tip, 2m cable
- Power 2 x AAA batteries
- Warranty 5-year meter, 6-month Leap probe
Dimlux Humidity Sensor – For Dimlux Maxi Controller
- Type Relative humidity sensor
- Compatible With Dimlux Maxi Controller
- Cable Lengths 5 metres, 10 metres
- Function Reports grow room humidity to the controller'...
- Fitment Plug-in connection to the controller
- Measures Relative humidity of the grow room
- Calibration RH offset adjustable in the controller menu
- Cable length, 5m Cable 5 m (16 ft)
- Cable length, 10m Cable 10 m (33 ft)
- Controller port Plugs into the RH/T2 port
- Controls Switches a humidifier or dehumidifier
- Mounting Hang in shade, shielded from direct light
- VPD Contributes RH to the controller VPD figure
- Works with Dimlux Maxi Controller and Maxi Controller EVO
Dimlux Digital Plant Temperature Camera – For Xtreme LED
- Type Digital plant (leaf) temperature camera
- Compatibility Dimlux Xtreme LED only - not the older analogue s...
- Supplied with Mounting bracket
- Cable 3 m as standard; 10 metre version also offered
- Mounting On the fixture, angled to match the lighting
- Use Plant temperature-led climate and VPD control
Growlink ClimaLINK Climate Sensor – Humidity, Light and VPD
- Measures Temperature, humidity, light, optional CO₂
- Temperature Range -40 to 125°C, accuracy ±0.1°C
- Humidity Range 0 to 100% RH, accuracy ±1.0%
- CO₂ Range (optional) 0 to 5,000 ppm, accuracy ±3%
- VPD Calculated automatically
- Sensor Design Aspirated, with protective dust and moisture filters
- Dimensions 23.5 x 11.1 x 9.5 cm (9.25 x 4.375 x 3.75 in)
- Included ClimaLINK sensor and 5m M8 connection cable
- Requires CanopyLINK 8-Port Sensor Hub (not included)
- Platform Growlink OS
- Power input 24 V DC
- CO₂ compensation, With CO2 Sensor Pressure compensated at any altitude
- Light reading Light level, reported in Lux
- Operating temperature 10 to 50°C (50 to 122°F)
- Origin Made in USA
Continuous monitors and controllers
Log the room, or dose to a set point
Bluelab Guardian Monitor (Wifi Version) – pH EC Temp Alerts
- Measures pH, conductivity and temperature
- pH range 0.0 to 14.0 pH
- Conductivity range 0.0 to 5.0 EC (units switchable between EC, CF, p...
- Temperature range 0.0 to 50.0 °C
- Connectivity built-in Wi-Fi (can be disabled), Edenic app comp...
- Alarms high/low for pH, conductivity and temperature
- Memory non-volatile, retains settings through power loss
- Display plant-safe green LEDs with adjustable brightness
- Probe cables 2 m (6'6")
- Guarantee 2 years on the unit, 6 months on the pH probe
- CF range 0 to 50 CF
- ppm 500 range 0 to 2,500 ppm 500 (TDS)
- ppm 700 range 0 to 3,500 ppm 700
- Signal range 20 m indoor, 50 m line of sight
- CF accuracy ±1 CF at 25°C
- Conductivity accuracy ±0.1 EC at 25°C
- Conductivity resolution 0.1 EC
- pH accuracy ±0.1 pH at 25°C
- pH resolution 0.1 pH
- ppm 500 accuracy ±50 ppm at 25°C
- ppm 700 accuracy ±70 ppm at 25°C
- ppm resolution 10 ppm
- Temperature accuracy ±1°C at 25°C
- Temperature resolution 1°C
- Conductivity calibration Not required, factory calibrated
- pH calibration Two point, pH 7.0 then pH 4.0 or 10.0
- Power supply 100 to 240 VAC, 50/60 Hz
- pH probe connection BNC, replaceable Bluelab pH Probe
- App Edenic, Android 8.0+ or iOS 12+
- Bluetooth Bluetooth 5 (Low Energy)
- Plug types 4 interchangeable
- Wi-Fi 2.4 GHz, 802.11 b/g/n
Essentials CO2 Monitor – For Grow Tents & Grow Rooms
- Sensor NDIR (Non-Dispersive Infrared) CO2
- Displays CO2 (ppm), temperature, relative humidity, clock,...
- Backlight green / amber / red CO2 indication, seven selecta...
- Alarm programmable audible alarm at a user-set CO2 level
- Power USB, mains adaptor supplied (or PC / USB power bank)
Grow Tools CO2 Monitor – Digital CO2 Monitoring Device
- Measures CO2 concentration, temperature and relative humidity
- Refresh rate 1 second
- Display colour LCD with CO2 ring indicator
- Power rechargeable internal battery
Bluelab pH Controller – Automatic Dosing for Reservoirs
- Control range 0.1-13.9 pH, resolution 0.1
- Dose rate 10ml per minute
- Reservoir capacity up to 760 litres
- Dimensions 20 x 11 x 21cm
- Power 100-240VAC, 50/60Hz, 0.4A output
- Operating environment 0-50C
- Includes pH probe, temperature probe, peristaltic pump, 4m...
- Languages English, Deutsch, Español, Français, Nederlands
Bluelab pH Controller Wi-Fi – Remote Dosing via Edenic App
- pH range 0.0-14.0, resolution 0.1, accuracy +/-0.1
- Pump flow rate up to 120ml/min, variable speed
- Connectivity optional Wi-Fi, Edenic app
- Power 100-240VAC, 50/60Hz, 5VDC 1.5A output
- Operating environment 0-50C (32-122F)
- Includes pH probe, temperature probe, probe holder, 4m aci...
- Warranty 2-year controller, 6-month pH probe
Bluelab pH Probe – Replacement for Guardian Monitor, 2m
- Type double-junction Ag/AgCl, saturated KCl gel-filled
- pH range 0.0-14.0
- Resolution 0.1 and 0.01 pH
- Operating environment 0-60C (32-140F), solution 0.2 EC and above
- Connector BNC, 2m cable
- Compatibility Guardian Monitor and other BNC-connection Bluelab...
- Warranty 6 months
Dimlux Maxi Controller V1.2 – CO2 Sensor & 10m Cable Kit
- Controller Dimlux Maxi Controller V1.2
- Sensor Dimlux CO₂ Sensor with integrated light cell
- Cable Length 10 metres, data plug to "CO₂" slot
- Controls Lighting, CO₂ dosing, heaters, humidifiers
- Night Dosing Disabled automatically via light cell
- Lamp Dimming Automatic on ambient temperature threshold
- Sensor Power Mains wall socket, switched outlet for CO₂ genera...
- Relay Required No – connects directly without relay, time delay ...
Bluelab Pro Controller Wi-Fi – pH & EC Automation
- Brand Bluelab
- Measures pH, conductivity and temperature
- Monitoring Continuous, 24/7
- Connectivity Built-in Wi-Fi, integrates with Edenic.io, can be...
- Probes Replaceable, high-precision
- Dosing Automated via Bluelab PeriPod M3, M4 or L3 (sold ...
- Temperature control Compatible with Bluelab PowerPod
- Safety Lockouts, visual alarms and automated dosing stops
- Settings Customisable pH, conductivity and dosing routines
- CF range 0 to 50 CF
- Conductivity control range 0.1 to 4.9 EC
- Conductivity range 0.0 to 5.0 EC
- pH control range 0.1 to 13.9 pH
- pH range 0.0 to 14.0 pH
- ppm 500 range 0 to 2,500 ppm 500 (TDS)
- ppm 700 range 0 to 3,500 ppm 700
- Signal range 20 m indoor, 50 m line of sight
- Temperature control range 1 to 49°C
- Temperature range 0 to 50°C (32 to 122°F)
- Conductivity accuracy ±0.1 EC at 25°C
- pH accuracy ±0.1 pH at 25°C
- pH resolution 0.1 pH
- Temperature accuracy ±1°C at 25°C
- Conductivity calibration Optional, factory calibrated
- pH calibration One, two or three point (7.0, 4.0, 10.0)
- Waterproof rating Not IP rated, splash proof
- Display Large green LED, adjustable brightness
- Power supply 100 to 240 VAC, 50/60 Hz adaptor
- Probe cable length 2 m (6 ft) on each probe
- Probes supplied pH, conductivity and temperature probes
- App Edenic, Android 8.0+ or iOS 12+
- Bluetooth Bluetooth 5 (Low Energy)
- Dosing off-time 0 to 59 min 50 s, in 10-second steps
- Dosing on-time 1 to 10 minutes, in 1-second steps
- Dosing outputs Up to 3 PeriPods (M3, M4 or L3) chained
- Operating humidity 5 to 95 %RH
- Plug types 4 interchangeable
- Warranty 2 years, 6 months on the pH probe
- Wi-Fi 2.4 GHz, 802.11 b/g/n
Bluelab Pro Controller Connect – pH & EC Doser
- Controls pH, EC (conductivity) and nutrient temperature
- Dosing channels pH plus up to 11 nutrients (PeriPods required)
- Increments pH and EC adjustable in 0.1 steps
- Scheduling week-by-week programmable feed schedule
- Connectivity 2.4 GHz ISM via the Connect Stick 2, included
- Peripherals PeriPods, PowerPod, external dosing pumps, chille...
- Measures pH, conductivity and temperature
- CF range 0 to 50 CF
- Conductivity control range 0.1 to 4.9 EC
- Conductivity range 0.0 to 5.0 EC
- pH control range 0.1 to 13.9 pH
- pH range 0.0 to 14.0 pH
- ppm 500 range 0 to 2,500 ppm 500 (TDS)
- ppm 700 range 0 to 3,500 ppm 700
- Signal range 20 m indoor, 50 m line of sight
- Temperature control range 1 to 49°C
- Temperature range 0 to 50°C (32 to 122°F)
- Conductivity accuracy ±0.1 EC at 25°C
- pH accuracy ±0.1 pH at 25°C
- pH resolution 0.1 pH
- Temperature accuracy ±1°C at 25°C
- Conductivity calibration Optional, factory calibrated
- pH calibration One, two or three point (7.0, 4.0, 10.0)
- Waterproof rating Not IP rated, splash proof
- Power supply 100 to 240 VAC, 50/60 Hz, 5 VA
- Probe cable length 2 m (6.5 ft) on each probe
- Probes supplied pH, conductivity and temperature probes
- Adaptor output 24 VDC, 0.4 A
- Dosing off-time 0 to 59 min 50 s, in 10-second steps
- Dosing on-time 1 to 10 minutes, in 1-second steps
- Plug types 4 interchangeable
- Software Bluelab Connect, Windows XP or later
- Warranty 2 years, 6 months on the pH probe
The full range
pH and EC meters for grow tent feeding
Checking pH and EC before every feed is the single habit that separates a struggling grow from a consistent one. Nutrients lock out fast outside pH 5.8–6.2 in coco or hydro, and an EC that creeps up feed after feed without you noticing is the most common cause of tip burn we see reported in-store. A pen meter takes ten seconds — there's no good reason to skip it.
Bluelab is the trusted end of the range here: the pH Pen (£89.95) and EC Pen (£79.95) are built to last years, the Nutrient Truncheon (£89.95) needs no calibration for quick EC checks, and the Combo Meter (£233.95) or wifi-enabled Guardian Monitor (£314.95) suit anyone running multiple tents who wants one number to trust. For starting out, the Grow Gadgets Hobby pH Pen (£19.95) and Hobby EC Pen (£14.95) do the job without the outlay, and a basic pH Test Kit (£4.95) covers you if a pen ever dies mid-grow.
The habit that keeps a meter accurate
A pH probe that dries out between uses drifts fast and reads wrong when you need it most. Store the probe wet — Growth Technology pH Probe Refill & Storage solution (£5.95) is made exactly for this — and run a pH Probe Cleaner (£5.95) through it every few weeks if you're feeding hard water. Calibrate weekly, not monthly, and always calibrate before you notice a problem rather than after.
Once your numbers are right, the next step is correcting them — see our pH and nutrient control range, and if you're new to coco our coco feeding guide walks through target ranges stage by stage. Free UK delivery over £60, or call 020 3488 0419 if you're deciding between a pen and a full meter.