The Apure KPR is an online ORP sensor for compatible aqueous processes. The listed digital configuration communicates through RS485 using Modbus RTU. Select the exact sensor version, wetted materials, mounting and receiving device for the process.

Wide application range
Long life
Easy to install

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Features

Easy to connect to PLC, DCS, industrial control computer, universal controller, paperless recording instrument or touch screen and other third-party equipment.
Dual high impedance differential amplifiers for high interference immunity and fast response time.
Patented ORP electrode, the internal reference fluid leaks out of the microporous salt bridge extremely slowly at a pressure of at least 100KPa (1Bar), and its positive leaching lasts for more than 20 months. Such a reference system is very stable and the electrode life is exponentially longer than that of ordinary industrial electrodes.
Easy to install: 3/4 NPT pipe thread for easy sinking or mounting in pipes and tanks.

Product Name	Digital ORP sensor
Brand	APURE
Measurement range	-1500～+1500mV
Temp	0-65°C
Pressure (MPa)	＜0.1MPa
Output signal	RS485(MODBUS/RTU)
Accuracy	±6mV
Power Supply	12VDC~24VDC ±10%
Resolution	1mV
Cable length	5m, other length can be customized

ORP measurement and digital connection

ORP is an electrode potential measured relative to the sensor’s reference system. Its mV value describes the redox condition of the sample; it is not a direct measurement of pH or of a specific oxidant concentration. Use the same reference basis when comparing readings or setting process limits.

The listed RS485/Modbus RTU configuration uses a digital serial link. Match power, wiring, serial settings and the supplied register map to the receiving device. Confirm the exact KPR version or suffix on the quotation and instrument documentation before pairing equipment.

Process and maintenance requirements

Check the sensor’s listed medium temperature and pressure limits together with its wetted materials, reference junction and process connection. Acid, alkali or salt applications require material and sample compatibility checks; a broad application category alone is not enough to select the probe.

The internal reference-system pressure and the allowable external medium pressure describe different conditions. Use the actual sensor instructions for installation, verification solution, approved cleaning and storage. Maintenance and replacement intervals depend on the sample and operating conditions.