pH/ORP Transmitter

4-wire

• Liquisys CPM253 features the following protocols and interfaces: 0/4...20 mA, HART, PROFIBUS DP, PROFIBUS PA • Enhanced operational safety: continuous process monitoring system, customisable alarm settings, and optimised Memosens interface for reliable sensor connection. • Reliable self‑monitoring: sensor diagnostic system for pH electrode calibration and calibration plausibility check. • Easy operation and maintenance: intuitive user interface, hot‑swappable pre‑calibrated Memosens sensors, and direct manual contact control. • Reduced maintenance workload: automatic cleaning function (with Chemoclean) triggered by alarms or limit switches. • Suitable for diverse applications: multiple extended functions including PID controller and timer for flexible deployment in all processes.

The Liquisys CPM253 is a standard pH/ORP transmitter for analog and digital Memosens sensors. It improves operational safety through continuous plausibility, measurement‑process and sensor monitoring. Regardless of the selected hardware and software modules, such as relays and fieldbus communication, it can be fully adapted to measurement tasks. The transmitter supports on‑demand upgrades at any time. Its simple menu structure and factory calibration enable fast and convenient configuration and operation. The Liquisys CPM253 transmitter is compatible with all pH/ORP glass electrodes and ISFET electrodes for use in non‑hazardous areas. It applies to the following industries and applications: chemical, food & beverage, power & energy, water & wastewater, basic raw materials & metallurgy.