pH/EC/TDS/Temperature meter with HI1285-51 electrode; EC range: 0 to 6000 µS/cm, TDS range: 0 to 3000 ppm (mg/L)

pH Measurement
Range
0.0 to 14.0 pH
Resolution
0.1 pH
Accuracy (@25 °C / 77 °F)
±0.1 pH
Calibration
Manual, 1-point calibration via offset trimmer

Temperature Measurement
Range
0.0 to 70.0 °C
Resolution
0.1 °C
Accuracy (@25 °C / 77 °F)
±0.5 °C
Calibration
Automatic, 0 to 70 °C with ß = 2% / °C

Electrical Conductivity (EC)
Range
0 to 6000 µS/cm
Resolution
10 µS/cm
Accuracy (@25 °C / 77 °F)
±2% F.S.
Calibration
Manual, 1-point calibration via slope trimmer

Total Dissolved Solids (TDS)
Range
0 to 3000 ppm (mg/L)
Resolution
10 ppm (mg/L)
Accuracy (@25 °C / 77 °F)
±2% F.S.
Conversion Factor
0.5 ppm (mg/L) = 1 µS/cm
Calibration
Manual, 1-point calibration via slope trimmer

General Specifications
Power Supply
9 V battery
Approx. 450 hours of continuous use
Operating Environment
0 to 50 °C (32 to 122 °F)
Max. 100% RH
Dimensions
145 × 80 × 36 mm
(5.7 × 3.1 × 1.4 in.)
Weight
230 g (8.1 oz.)

Probe & Accessories
Recommended / Supplied Probe
HI1285-51 multiparameter probe
Polypropylene body
Pre-amplified with internal temperature sensor
8-pin DIN connector
1 m (3.3 ft) cable
Ordering Information
HI9811-51 is supplied with:
HI1285-51 multiparameter probe
HI70007 pH 7.01 calibration solution sachet
HI70032 1382 ppm (mg/L) calibration solution sachet
HI70031 1413 µS/cm calibration solution sachet
HI700661 electrode cleaning solution sachets (2)
9 V battery
Instruction manual
Rugged carrying case