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Home > Mini Panel Mounted Controllers > Mini Panel Mounted Controllers
The BL 932700 is an ORP mini controller that has been designed for easy, affordable installation in tight spaces, ideal for simple yet effective process control. As a result of its compact size, the BL 932700 can be installed right next to tanks or vats.
This versatile controller is ideal for many applications, such as ORP monitoring bleaching processes, waste water treatment and swimming pools. BL 932700 permits automatic control of installations previously checked manually.
The instrument can be set for reducing or oxidizing dosage. It measures in the ±1000 mV range, with 1 mV resolution. Set point adjustment and calibration are simply performed through trimmers on the front panel. Users can choose automatic or manual dosing mode with a switch on the front panel. Manual control is particularly useful during maintenance operations, because it permits operators to enable or disable the dosing relay according to need.
The overtime control system advises users when the relay is active too long, helping to prevent over dosage. In addition, this model features a 4-20 mA analog output for recorder connection.
Order Information:
BL 932700-0 (12 VDC) and BL 932700-1 ( 115/230V) are supplied with mounting brackets, transparent cover and instruction manual.

| Range | ±1000 mV | |
| Resolution | 1 mV | |
| Accuracy | ±5 mV | |
| Calibration | manual, with CAL trimmer | |
| Dosing Relay | maximum 2A (fuse protected), 250 Vac, 30 VDC | |
| Dosing Selection | reducing or oxidizing, selectable on the back panel contact open=reductant dosage=relay ON if measure > set point contact close=oxidant dosage=relay ON if measure < set point | |
| Setpoint | adjustable from -1000 to 1000 mV | |
| Overtime | adjustable, typically from 5 to approx. 30 minutes | |
| Recorder Output | 4-20 mA, accuracy ±0.20 mA, 500 Ohm max load | |
| Input Impedance | 102 Ohm | |
| Power Supply | See Chart | |
| Dimensions | 79 x 49 x 95 mm (3.1 x 1.9 x 3.7’’) | |
| Weight | See Chart |
| Solutions | |
|---|---|
| HI 7020L | ORP Test Solution at 200/275 mV (@20°C) 1 x 500 mL bottle |
| HI 7022L | ORP Test Solution at 470 mV @ 25°C/77°F) 1 x 500 mL bottle |
| HI 7091L | Reducing Pretreatment Solution 1 x 500 mL bottle |
| HI 7092L | Oxidizing Pretreatment Solution 1 x 500 mL bottle |
| HI 70300L | Electrode Storage Solution 1 x 500 mL bottle |
| HI 7061L | General Purpose Cleaning Solution 1 x 500 mL bottle |
| Accessories | |
| HI 710005 | Power Adapter, 115 Vac to 12 VDC, US Plug |
| HI 710006 | Power Adapter, 230 Vac to 12 VDC, European Plug |
| HI 740146 | Mounting Brackets for BL 931700 Housing |
| Probes | |
| HI 2001 | Flow-thru Monitoring ORP Electrode with BNC Connection and 3 m Cable |
Manual: (Download)
Literature: (Download)
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