Great for water, laboratory or plant use, these multiparameter Testrs feature single-junction pH electrodes for longer life and wider range of sample compatibility. Pin-style conductivity sensors feature stainless steel electrodes for chemical resistance and durability. Replaceable sensor module saves you money by reusing the meter body. Advanced features include auto-shutoff, user-adjustable temperature coefficient and low-battery indicator.

Multiparameter 35-Series Testrs

Our most versatile Testrs combine up to  five measurements in one pocket-sized meter

• Determine pH, conductivity, TDS, salinity, and temperature – Great for water, wastewater, laboratory, or plant use
• Accuracy up to ±0.01 for pH;  ±1% full-scale for EC/TDS/salt – Ideal for a wide variety of applications
• Long-lasting pH sensor with PVDF reference junction – Large volume of polymer gel reference gives long, clog-free sensor lifespan
• Stainless steel pin-style conductivity sensors – Durable and compatible with a wide range of samples
• Adjustable TDS factor, temperature coefficient, and salinity factor – Provide accurate readings under changing conditions
• Push-button calibration – Calibrate more precisely than trimpot adjustment;  no screwdrivers necessary
• Automatic temperature compensation (ATC) – Gives you accurate readings even with fluctuating temperatures
• Waterproof, dustproof housing – Meets IP67 rating, plus it floats!
• Hold function – Freezes reading until you can record it
• Auto shutoff – Extends the life of batteries

Applications

• Water quality: Hydroponics/agriculture, research labs, industrial process checks, pools, and spas, drinking water, wastewater, aquaculture

Getting Started:

Your instrument has been factory calibrated and usually works well out of the box. However, after extended periods of non-use, it’s best to remove the sensor cap and soak the sensor (pictured here) in warm tap water or pH buffer for 10 minutes or so.