Hanna Instruments HI-8931DN Panel Mounted Conductivity Controller
Make process monitoring easy and affordable with a mid-range controller from our analogue process control series. Extremely accurate and simple to install.
Panel mounted conductivity controller 0.0-199.9 µS/cm. Hanna’s mid-range controllers offer economical, constant monitoring of pH, Oxidation Reduction Potential (ORP), Electrical Conductivity (EC), and Dissolved Oxygen. The compact, easy-to-use controllers are designed to consistently perform in most environments and conditions twenty-four/seven.
An analogue controller can be configured by you to your exact process requirements.
There is no need to worry about space or cost, as all the controllers can be installed in confined spaces and the low cost means previously manual monitoring can now be automated, saving time and money.
HI-8931DN Conductivity Controller (Range 0.0 to 199.9 μS/cm)
A simple panel mounted conductivity controller designed for easy operation. The HI-8931 range should be used with the HI-8936 transmitter series. Using the correct transmitter will ensure a strong, interference-free signal at a distance of up to 300 metres (1000 feet).
The output configuration for connecting a recorder or a PLC can be chosen between 0-20 or 4-20 mA.
Use a HI-7135 electrode for in-line applications or the HI-7638 with external threads for tanks. The electrodes contain a built-in NTC sensor for temperature compensated conductivity measurements.
The controllers have large, easy-to-read displays, fire-retardant casing, electrode input, automatic alarm features, recorder output, plus dosing consent feature on ORP and pH models.
The front panel is protected behind a transparent splash-proof cover.
Order Information:
The HI-8931 series is supplied with mounting brackets and instructions.
Specifications
| EC Range | HI-8931AN: 0.0 to 199.9 mS/cm HI-8931BN: 0.00 to 19.99 mS/cm HI-8931CN: 0 to 1999 µS/cm HI-8931DN: 0.0 to 199.9 µS/cm |
| EC Resolution | HI-8931AN: 0.1 mS/cm HI-8931BN: 0.01 mS/cm HI-8931CN: 1 µS/cm HI-8931DN: 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 with β=2%/°C; see also transmitter HI-8936 |
| Input Channels | DIN (probe) or 4-20 mA (transmitter) |
| EC/TDS Probe | HI-7635 for in-line applications or HI-3001D for flow-thru (not included) |
| Alarm Relay Range | HI-8931AN: 0.0 mS and 100.0 mS HI-8931BN: 0.00 mS and 10.00 mS HI-8931CN: 0 µS and 1000 µS HI-8931DN: 0.0 µS and 100.0 µS |
| Dosing Control | OFF/AUTO/ON with selection switch |
| Over Dosing Control | adjustable, from 5 min to 60 min at front or disable by wire strap - on rear panel |
| Digital Input Signal | HI-8931AN: HI-8936A / A HI-8931BN: HI-8936B / BL HI-8931CN: HI-8936C / CL HI-8931DN: HI-8936D / DL |
| Backlight | continuous on |
| Enclosure | flame retardant ABS body and front panel; transparent splash-proof front cover |
| Panel cut out | 141 x 69 mm (5.6 x 2.7”) |
| Recorder Output | 0 to 20 mA or 4 to 20 mA (isolated) |
| Set Point | 1, Isolated, 2A, max. 240V, resistive load, 1,000,000 strokes; range: 0.0 to 199.9 mS/cm; 0.00 to 19.99 mS/cm; 0 to 1999 µS/cm; 0.0 to 199.9 µS/cm |
| Power Supply | 230 VAC ±10%; 50/60 Hz |
| Environment | -10 to 50°C (14 to 122°F); RH max 95% non-condensing |
| Weight | 1 kg (2.2 lbs.) |
| Ordering Information | The HI-8931 series is supplied with mounting brackets and instructions. |
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.