Waterproof Multiparameter PCS Testr 35 from Oakton Instruments

One pocket sized meter for pH, conductivity, TDS, salinity and temperature!

  • Combine measurement capabilities of three testers in one convenient pocket-sized unit

  • Up to 5 point pH calibration with NIST or USA autobuffer recognition

  • Conductivty, TDS, and salinity feature autoranging based on the concentration of your sample

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, self-adjusting TDS and salinity factor, and low-battery indicator.

Click below to download Acrobat (.pdf) file of:

Waterproof Multiparameter PCSTestr35 Pocket Meter Manual

Learn more about the Oakton Multiparameter Testrs

See how easy is it to replace the sensor on your Oakton Testr

Troubleshooting your Oakton pHTestr


Range pH: 0.0 to 14.0
Conductivity: 0 to 200 uS; 201 to 2000 uS; 2.01 to 20.00 mS
TDS: 0 to 100.0 ppm; 100 to 1000 ppm;01.00 to 10.00 ppt
Salinity: 0 to 999 ppm
Temp: 32 to 122F (0 to 50C) 2.01 to 10.00 ppt
Resolution pH: 0.1 pH
Conductivity: 10 uS, 0.1 mS
TDS: 0.1 ppm, 1 ppm; 0.01 ppt
Salinity: 0.1 below 100 ppm/1 ppm above
Temperature: 0.1
Accuracy pH: 0.1 pH
Conductivity: 1% full-scale
TDS: 1% full-scale
Salinity: 1% full-scale
Temperature: 0.5C, 0.9F
Calibration pH: 5 points
Conductivity: 3 points
TDS: 3 points
Salinity: 1 point
Temperature: 1 point
Electrode Replaceable
pH: single-junction
Conductivity/TDS/salinity: dual-pin stainless steel
Waterproof/Dustproof (IP67) Yes
Operating Temperature 0 to 50C (32 to 122F)
Power Four 1.5 V alkaline batteries (included), Eveready A761 LR44 equivalent replacement
Battery life Approximately 250 hours continuous use
Dimensions Unit only: 6.5" x 1.5" dia (16.5 x 3.8 cm)
Boxed: 7.25" x 2.5" x 2" (18.4 x 6.4 x 5.0 cm)
Shipping weight Unit only: 3.25 oz (90 g);
Boxed 6.0 oz (170 g)