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Bluelab Combo Meter
The Bluelab Combo Meter is a professional, handheld solution for monitoring pH, electrical conductivity (EC), and temperature, three of the most critical parameters in plant nutrient management. Designed for both hydroponic and soil-based growing systems, it delivers fast, accurate readings that allow growers to fine-tune nutrient strength and pH balance with confidence.
With a replaceable double-junction pH probe and a factory-calibrated conductivity/temperature probe, the Combo Meter ensures long-term reliability and easy maintenance. The large backlit display makes it simple to view readings in any environment, while the lightweight portable design means you can check multiple tanks or reservoirs with a single device. Powered by two AAA batteries, it’s ready to work wherever your grow takes you.
Built for precision and durability, the Bluelab Combo Meter is trusted worldwide by growers who demand consistent performance and laboratory-grade accuracy in the field.

3-in-1 Measurement
Simultaneous testing of pH, EC, and temperature for complete nutrient monitoring
Easy Calibration
User-calibratable pH probe with factory-set EC and temperature accuracy
Reliable Readings
High-precision sensors provide consistent data for optimised nutrient deliveryPortable, accurate, and effortless nutrient monitoring for dependable growing results anywhere.
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Bluelab Combo Meter
Key Highlights
      
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Key Highlights
      - Measures pH, EC, CF, ppm (500/700), and temperature
 - Backlit digital display for low-light visibility
 - Replaceable double-junction pH probe (BNC connection)
 - Factory-calibrated EC/temperature probe, no EC calibration required
 - Auto temperature compensation for accurate readings
 - Runs on 2 × AAA batteries for full portability
 - 5-year warranty on meter (6 months on pH probe)
 
Directions for Use
      
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Directions for Use
      - Submerge the probes into the nutrient solution or sample.
 - Allow readings to stabilise on the display.
 - Calibrate the pH probe using Bluelab pH 4.0 and 7.0 calibration solutions as needed.
 - Rinse probes thoroughly between uses with clean water.
 - Store the pH probe tip in Bluelab KCl storage solution to maintain accuracy.
 
Technical Specifications
      
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Technical Specifications
      - Measurement Parameters: pH, EC, CF, ppm (500 & 700 scale), Temperature (°C/°F)
 - pH Range: 0.0 – 14.0
 - pH Resolution: 0.1
 - pH Accuracy @ 25°C / 77°F: ±0.1
 - Temperature Range: 0 – 50°C (32 – 122°F)
 - Temperature Resolution: 1°C (1°F)
 - Temperature Accuracy @ 25°C / 77°F: ±1°C (±2°F)
 - EC Range: 0.0 – 9.9 mS/cm
 - Resolution: 0.1 mS/cm
 - Accuracy: ±0.1 mS/cm
 - CF Range: 0 – 99
 - CF Resolution: 1
 - CF Accuracy: ±1
 - PPM 500 (TDS): 0 – 4950 ppm
 - TDS Resolution: 10 ppm
 - TDS Accuracy: ±50 ppm
 - PPM 700: 0 – 6930 ppm
 - PPM 700 Resolution: 10 ppm
 - PPM 700 Accuracy: ±70 ppm
 - Power Source: 2 × AAA alkaline batteries
 - Warranty: 5-year limited (6 months for pH probe)
 - Box Contents
1 × Bluelab Combo Meter with Conductivity/Temperature Probe
1 × Bluelab pH Probe
1 × Bluelab pH Probe Holder with Suction Cup
1 × Bluelab pH 7.0 Calibration Solution (single-use)
1 × Bluelab pH 4.0 Calibration Solution (single-use)
1 × Bluelab KCl Storage Solution 
Resources
      
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Resources
      
Shipping & Returns
      
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Shipping & Returns
      We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at info@hydrooasis.com.au
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at info@hydrooasis.com.au.