ReefSense PH & Temp Probe
Water type
Marine
Fits
Red Sea ReefControl Lite, Red Sea ReefControl Pro
Part no.
BA9025
Replace every
12 months
ReefSense PH & Temp Probe
Live pH and temperature, not a once-a-week test. The Red Sea ReefSense pH & Temp Probe is a digital electrode that reads pH and temperature continuously and streams both to the ReefBeat app through a ReefControl Lite or Pro controller, so a slow drift or a sudden swing shows up on your phone as it happens. It's an add-on probe – it needs a ReefControl controller to function.
Key features
- Continuous pH and temperature – accurate to 0.05 pH with 0.01 pH precision, and 0.05°C on temperature, read live rather than dipped once a week.
- Dual ceramic double-junction electrode – built for stability in reef water over the long term.
- Bluetooth calibration at the sink – calibrate monthly using pH 7 and pH 10 solutions, from your phone.
- Calibration travels with the probe – its calibration data is stored on the probe itself, so moving it to another ReefControl controller doesn't mean recalibrating.
- Trend history and alerts – ReefBeat logs the data and can flag you the moment a reading moves outside where you want it.
Specifications
| Brand | Red Sea |
|---|---|
| Measures | pH and temperature, continuous digital reading |
| SKU | BA9025 |
| pH accuracy | 0.05 pH |
| pH precision | 0.01 pH |
| Temperature accuracy | 0.05°C |
| Sensor design | Dual ceramic double-junction electrode |
| Connects via | One ReefSense port on ReefControl Lite or Pro |
| Calibration | Bluetooth, monthly, using pH 7 and pH 10 solutions |
| Typical service life | Approx. 12 months of continuous use – a wear item |
| Warranty | 6 months |
Red Sea does not publish a stated pH measurement range for this probe – only the accuracy and precision figures above.
What's included / Not included
In the box: one ReefSense pH & Temp Probe.
Not included: pH 7 and pH 10 calibration solutions for monthly calibration, and the ReefControl Lite or Pro controller this probe plugs into and depends on. Without a controller, this probe has no way to display or log a reading.
Suitable for, and not suitable for
Suitable for marine and reef systems already running, or being set up with, a ReefControl Lite or Pro controller – the primary pH and temperature reference for the whole system.
Not suitable as a spot-check meter – it's a fixed, wired probe built for continuous in-tank monitoring, not a handheld pen for testing other people's tanks or top-up water.
Care and maintenance
Calibrate monthly over Bluetooth using Red Sea's pH 7 and pH 10 solutions – done at the sink, without needing to remove the probe permanently from the system. As an electrode-type probe it's a wear item: expect roughly 12 months of continuous service life, matching the 6-month warranty Red Sea puts on it.
Goes well with
- ReefControl Lite or Pro – many ReefControl kits already include one pH & Temp probe as the starting sensor; this listing is for a spare or a second probe.
- ReefSense ORP Probe and ReefSense Salinity & Temperature Probe – round out water chemistry monitoring on the same controller.
- ReefSense Magnetic 4-Probe Holder – mounts this probe alongside up to three others at a consistent depth.
Warranty and delivery
Red Sea covers the pH & Temp probe for 6 months as a wear item, in addition to your rights under Australian Consumer Law. Small, lightweight item – standard parcel delivery.
Common questions
Does this probe work without a ReefControl controller?
No. It plugs into a ReefSense port on a ReefControl Lite or Pro controller and has no independent display or connectivity.
How often does it need calibrating?
Monthly, over Bluetooth, using Red Sea's pH 7 and pH 10 calibration solutions.
Why is the warranty shorter than other ReefSense sensors?
pH electrodes wear with continuous use – Red Sea rates this probe for about 12 months of service and backs it with a 6-month warranty, shorter than the 24 months on non-wearing accessories like the leak detector.
Does ReefControl Lite or Pro already come with one of these?
Check the specific controller listing – Red Sea's controller kits are commonly bundled with one pH & Temp probe and a probe holder; this page is for the probe on its own.
