HI 98143-20

pH and EC Transmitter with Galvanic Isolated Output 4-20 mA Output

The HI 98143 series is designed to accept signals directly from a pH electrode and a conductivity probe at the same time.

Direct connection of the probes to the transmitter assure a positive electrical connection with no signal loss. This transmitter is ideal for remote process control applications.

Four models are available, transmitting a 0-1 V, 0-4 V or 4-20 mA signal. The output signals are proportional to the input signals but independent of changes in load or cable capacitance. Compensation for the effects of temperature for EC measurements are performed by the transmitters’ Automatic Temperature Compenstion circuitry.

The transmitter can be connected to any pH or conductivity controller, recorder, PC or any data monitoring device that accepts 0 to 1 V, 0 to 4 V or 4 to 20 mA input. HI?98143 is an ideal tool for applications that require the monitoring of both pH and conductivity at the same time.

Specifications
Range pH 0 to 14 pH
EC 0 to 10 mS/cm
Accuracy @ 20°C pH ±0.5% f.s.
EC ±2% f.s.
Calibration pH manual, 2 point, through offset and slope trimmers
EC manual, 2 point, through 0 and 5 mS/cm trimmers
Temperature
Compensation (EC)  automatic, 0 to 60°C (32 to 132°F) with ß=2%/°C
Output (isolated)  4-20 mA
pH Electrode  HI 1001 pH electrode (suggested, not included), HI 1283 matching pin (not included)
EC Probe  HI 3001 (not included) with cell constant 2.1
Casing  IP 54
Power Supply  12-24 VDC
Environment  0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions  160 x 105 x 31 mm (6.3 x 4.1 x 1.2’’)
Weight  280 g (9.9 oz.)

Accessories
Solutions
HI 7004/1L  4.01 pH Buffer Solution
1 x 1 L bottle
HI 7007/1L  7.01 pH Buffer Solution
1 x 1 L bottle
HI 7010/1L  10.01 pH Buffer Solution
1 x 1 L bottle
HI 7039L  5000 µS/cm EC Solution, 500 mL Bottle
Accessories
HI 7855/1  Connection Cable with Screw and BNC Connectors, 1 m
Probes
HI 3001  Flow-thru Conductivity Probe with 3 m cable