Water resistant
On-screen tutorial messages for calibration
Switch parameters at the touch of a button
Automatic Temperature Compensation for pH and conductivity
Simple calibration; Dials located on the front panel makes calibration quick and simple, even for non-technical users
BEPS ( Battery Error Prevention System) alerts the user in the event that low battery power could adversely affect readings
Battery % displayed on startup
Fast response probe included
HI 9811-5 is a pH/ EC/ TDS waterproof meter designed for simplicity in taking pH, µ S/ cm, ppm ( mg/ L) and temperature measurements. both the HI 9811-5 and HI 9812-5 are ideal for hydroponics, greenhouses, farming and ground water applications.
Due to the built-in temperature sensor, conductivity readings are automatically compensated for temperature changes. The temperature coefficient is fixed
at 2% / ° C.
No probe changes are required when switching your measured parameter between pH, conductivity and TDS. These multiparameter meters reduce the number of instruments required for daily water quality analysis.
The specially engineered HI 1285-5 pH/ EC/ TDS and temperature probe utilizes a fiber junction and gel electrolyte which provide a fast response and reduced contamination. This combination makes the HI 1285-5 particularly designed to withstand harsh environments such as fertilizer solutions.
Range pH 0.0 to 14.0 pH
EC 0 to 6000 µ S/ cm
TDS 0 to 3000 mg/ L ( ppm)
Temperature 0 to 60° C
Resolution pH 0.1 pH
EC 10 µ S/ cm
TDS 10 mg/ L
Temperature 0° C
Accuracy pH ± 0.1 pH
EC ± 2% F.S.
TDS ± 2% F.S.
Temperature ± 0.5° C
TDS Conversion Factor 0.5 mg/ L = 1 µ S/ cm
Calibration manual at 1 point ( all parameters except temperature)
Temperature Compensation Automatic, 0 to 50° C with ß = 2% / ° C ( EC/ TDS only)
Probe HI 1285-5 polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, 8-pin DIN connector and 1 m ( 3.3’ ) cable ( included)
Battery Type / Life 9V / approximately 150 hours of continuous use
Environment 0 to 50° C ( 32 to 122° F) ; RH max 100%
Dimensions 145 x 80 x 36 mm ( 5.7 x 3.1 x 1.4” )
Weight 230 g ( 8.1 oz.)
