DLI Temperature Probe – For DLM-4 Zone Controller
DLI Temperature Probe – For DLM-4 Zone Controller
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
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Description
Let Your DLM-4 Dim the Lights Before the Room Overheats
The DLI Temperature Probe is the genuine replacement sensor for the DLI DLM-4 Zone Controller from Dutch Lighting Innovations. The DLM-4 takes one sensor per zone – up to four in all – and uses each reading to protect the crop: when the temperature passes the maximum set point you program, the controller automatically dims the fixtures, or shuts them down if it has to, and logs the event so you can find the cause afterwards. Without a working probe in a zone, that safety layer is missing.
Key Benefits
- Genuine DLI sensor made for the DLM-4 Zone Controller
- One probe per zone, up to four on a single DLM-4
- Automatic dimming or shutdown when a zone passes your maximum set point
- Every event logged on the controller, so over-temperature dimming can be traced
- Compact housing with a fixing lug for easy mounting at canopy level
Heat Stress When the Lights Run Flat Out
On a hot day a grow room under full power can climb past its comfortable range quickly, and plants answer with heat stress, excessive stretch and poor nutrient uptake. A controller can only react to heat it can measure. With a probe in each zone, the DLM-4 trims light output the moment the temperature crosses your set point and records when it happened, so you can fix the ventilation or cooling behind it.
How to Use
- Connect the probe to the DLM-4 sensor input for the zone it will monitor
- Mount it at canopy height, shaded from direct light and away from fans, heaters and air intakes, so it reads the air the plants are actually in
- Fit one probe per zone – each zone dims against its own reading
- Program the maximum temperature and the dimming action on the controller
- Check the DLM-4 event log after hot spells to see when and why it dimmed
Technical Specifications
- Brand: Dutch Lighting Innovations (DLI)
- Type: Temperature sensor (replacement probe)
- Compatible controller: DLI DLM-4 Zone Controller
- Sensors per controller: Up to 4 – one per zone
- Function: Feeds the DLM-4's over-temperature dimming or shutdown, with event logging
- Mounting: Fixing lug on the sensor housing
- Supplied: Probe only – controller not included
Frequently Asked Questions
Which DLI controller does this probe work with?
It is the replacement temperature probe for the DLI DLM-4 Zone Controller. The DLMini is a one-button output selector and is not listed for it.
How many probes can one DLM-4 use?
One per zone, so up to four on a single DLM-4. Each zone then dims against its own temperature reading.
What happens when the temperature passes the set point?
The DLM-4 dims the lights, or shuts them down if necessary, and logs the event so you can look into the cause.
Works Well With

FREE Express Delivery on orders over £60. 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.

