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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.
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.
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.) |
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