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EC Analog Controller with Input from Probe or Transmitter – HI8931

HI8931 series are panel mounted conductivity meters and controllers designed for simplicity of use in a wide range of industrial process applications.

  • Available in four models with different measurement ranges
  • Temperature compensation ensures fast, accurately compensated readings even during sudden temperature fluctuations
  • Backlit, LCD display for easy viewing.

Description

Measurement Specific Models

Four different models are available with different measurement ranges, each one to be used with the corresponding HI8936 model.

In-line and Tank Use

For in-line applications, the HI7635 In-line conductivity probe – NTC sensor is recommended, while the HI7638 In-line Conductivity probe with NTC sensor for immersion, with external threads, is recommended for tanks. These probes have built-in NTC sensors for temperature compensated conductivity measurements.

Automatic Temperature Compensation

Built-in temperature sensor in recommended probes ensure fast, accurately compensated readings even during sudden temperature fluctuations.

Use with Transmitter

Using the HI8931 in conjunction with a 4-20 mA output transmitter (HI8936 or HI8936L series) will assure a strong, interference free signal at distances up to 300 meters (1000’).

Direct Connection

HI8931 also features a direct connection up to 20 m (67’), without needing to amplify the signal to the conductivity probe.

Robust Design

A removable, transparent splash-proof cover protects the front panel.

Additional information

Weight 0.45 kg
Parameter

Conductivity/TDS

EC Accuracy

±2% F.S. (excluding probe error)

EC Calibration

manual, through offset and slope trimmers, two point

EC Range

HI8931AN: 0.0 to 199.9 mS/cm HI8931BN: 0.00 to 19.99 mS/cm HI8931CN: 0 to 1999 µS/cm HI8931DN: 0.0 to 199.9 µS/cm

EC Resolution

HI8931AN: 0.1 mS/cm HI8931BN: 0.01 mS/cm HI8931CN: 1 µS/cm HI8931DN: 0.1 µS/cm

Specifications

SKU HI8931-web
Name EC Analog Controller with Input from Probe or Transmitter – HI8931
EC Range HI8931AN: 0.0 to 199.9 mS/cm
HI8931BN: 0.00 to 19.99 mS/cm
HI8931CN: 0 to 1999 µS/cm
HI8931DN: 0.0 to 199.9 µS/cm
EC Resolution HI8931AN: 0.1 mS/cm
HI8931BN: 0.01 mS/cm
HI8931CN: 1 µS/cm
HI8931DN: 0.1 µS/cm
EC Accuracy ±2% F.S. (excluding probe error)
EC Calibration manual, two point, through offset and slope trimmers
EC/TDS Temperature Compensation automatic, 0 to 60°C (32 to 140°F), with β = 2%/°C
Alarm Relay Set Point load, 1,000,000 strokes
Enclosure DIN 43 700, 144×72 mm (5.7×2.8 in.), black anodized aluminum; front and back with shockproof ABS plastic, and transparent cover
EC/TDS Probe HI7635 for in-line applications or HI7638 for tank (not included)
Power Supply 115 or 230 Vac ±10% (user selectable); 50/60 Hz
Environment -10 to 50°C (14 to 122°F); RH 95%
Dimensions 141 x 69 mm (5.6 x 2.7 in.)
Weight 1 kg (2.2 lb.)

Manuals

EC Analog Controller with Input from Probe or Transmitter – HI8931