When an ORP sensor is constantly measuring a wastewater treatment process, it will be exposed to chemicals, suspended solids, and other contaminants. These contaminants can cause fouling of the ORP sensor reference, leading to sensor failure. Differential ORP sensors utilize three electrodes instead of the conventional two. This special design allows the sensor reference (salt bridge) and buffered electrolyte solution to be replaced, which extends working lifetime. Our Sensorex SD7420CD features differential sensor technology with a direct 4-20mA output, so it can be integrated into control systems without the use of a transmitter or controller.
Reliable measurement performance: True differential measurement technology using solution ground
Measurement Range: -2000mV to +2000mV
Power Supply (not included): 12 to 30 V DC (>24 V DC recommended)
Direct Fit Replacement:
Hach® 2428R0 LCP (Liquid Crystal Polymer) Differential ORP Sensor
Hach® 2422R0 Ryton® PPS Body Differential ORP Sensor
Water Analytics® R65C-8 CPVC Body Differential ORP Sensor