These meters feature a large LCD that displays Multiparameter pH, EC, TDS, or temperature readings along with tutorial instructions. The pH readings are shown with a 0.1 resolution and an accuracy of ±0.1 pH, while the EC and TDS readings are displayed with a 10 m/s/cm and 10 ppm (mg/L) resolution and 2% full-scale accuracy. Please select the meter with the range you require for your testing. \n \nThe temperature correction coefficient (β) is fixed at 2%/°C and allows for automatic temperature-compensated measurements of EC and TDS. These meters are calibrated manually to a single point with the use of two trimmers. pH is calibrated to 7.01, while EC/TDS is calibrated to 1.41 mS/cm (1413 µS/cm) or 1500 PPM. The LCD screen has a battery life indicator as well as on-screen tutorial messages. \n \nNo 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. \n \nThe supplied probe on all models features a polypropylene body, an amplified pH electrode with a built-in EC/TDS, and temperature sensors. The amplifier for the pH electrode prevents interference from humidity and electrical noise from common sources, including the motors, ballasts, or pumps. Click Here for More Information \n

Specification of HI9811-51 Multiparameter pH, TDS, EC, and Temperature Meter

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Range	EC	0 to 6000 µS/cm
	TDS	0 to 3000 ppm (mg/L)
	pH	0.0 to 14.0 pH
	Temp	0.0 to 70.0°C
Resolution	pH	0.1 pH
	EC	10 µs/cm
	TDS	10 ppm (mg/L)
Accuracy (@20°C/68°F)	pH	±0.1 pH
	EC	±2% F.S.
	TDS	±2% F.S.
	Temp	±1°C
TDS Conversion Factor		0.5 ppm (mg/L) = 1 µS/cm
pH Calibration		manual, 1 point through offset trimmer
EC/TDS Calibration		manual, 1 point through slope trimmer
EC/TDS Temperature Compensation		automatic from 0 to 70°C with β = 2% /°C
Probe		HI 1285-51 pH/EC/TDS/Temperature, polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, 8-pin DIN connector, and 1m cable included
Battery Type / Life		9V / approximately 450 hours of continuous use
Environment		0 to 50°C; RH 100%
Dimensions / Weight		145 x 80 x 36mm / 230g
Ordering Information		HI-9811-51 and HI-9812-51 are supplied with HI-1285-51 multiparameter probe, HI-70007 pH 7.01 calibration solution sachet, HI-70032 1382 ppm (mg/L) calibration solution sachet, HI-70031 1413 µS/cm calibration solution sachet, HI-700661 electrode cleaning solution sachets x 2, 9V battery x 1, instructions, and rugged carrying case.
Accessories		HI-710007 blue shockproof rubber boot; HI-710008 orange shockproof rubber boot

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• Multiparameter pH, TDS, EC, Temperature Meter
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• Ideal for agriculture, greenhouse, and hydroponics applications.
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• Model: HI9811-51
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• Brand: Hanna, Romania
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