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Bluelab pH Probe – Replacement for Guardian Monitor, 2m

Bluelab pH Probe – Replacement for Guardian Monitor, 2m

Regular price £68.90
Regular price Sale price £68.90
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Description

A genuine replacement probe to bring a tired Bluelab meter back to full accuracy

This is the standard Bluelab pH Probe with a 2 metre cable and BNC connector, the same double-junction probe fitted to the Guardian Monitor and other BNC-connection Bluelab meters and controllers. A pH probe is a consumable part: drift, a slow response and readings that will not hold calibration are signs the glass bulb and reference junction have reached the end of their life, and a straight swap restores lab-accurate readings without replacing the whole unit.

Key Benefits

  • Genuine Bluelab double-junction probe for a longer working life than single-junction alternatives
  • Standard BNC connector and 2m cable, a direct fit for the Guardian Monitor and other BNC-fitted Bluelab units
  • Waterproof polycarbonate body built for wet grow room use
  • KCl-filled storage cap keeps the tip hydrated between uses
  • Simple 2-point calibration against pH 4.0 and 7.0 or 10.0 solution

How to Use

  • Disconnect the old probe from the BNC socket and connect the replacement, twisting to lock it in place.
  • Calibrate in fresh pH 7.0 solution first, then pH 4.0 or pH 10.0 depending on your working range.
  • Store with the KCl-filled cap on and keep the tip wet; never let a probe dry out between uses.

Technical Specifications

  • 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 meters and controllers
  • Warranty: 6 months
  • Accuracy: ±0.1 pH at 25°C
  • Body: polycarbonate, waterproof
  • Shaft: Ø 12 x 122 mm
  • Electrode length: 163 mm (max)
  • Storage: KCl-filled storage cap
  • Includes: probe holder with suction cup

FREE Express Delivery on orders over £99. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.