The process pH sensor is engineered for continuous online pH monitoring in industrial production processes. Adopts high-performance chemical-resistant glass membrane, stable against acids, alkalis and common industrial media. Reinforced mechanical structure, anti-scaling and anti-impact, reliable under flow, stirring and slight pressure.

Built-in automatic temperature compensation. IP68 submersible design with standard 3/4" NPT thread for pipeline, tank and reactor mounting. Optional 4–20mA analog or RS485 Modbus-RTU output, easy to integrate with controllers, PLC and automation systems. Low maintenance, ideal for 24/7 process operation.

MTW-APH2521 Process pH Sensor is designed for continuous pH monitoring in industrial production pipelines and process systems. With optimized structural design, it adapts to inline installation and works stably under medium flow, pressure and conventional temperature changes.

This sensor adopts high-performance sensitive glass and durable reference system, featuring low drift, fast response and strong anti-fouling ability. Built-in temperature compensation ensures accurate readings throughout long-term continuous operation.

It is fully sealed with IP68 waterproof grade, compatible with various pH transmitters, controllers and industrial automation systems. Simple installation and low maintenance meet the demands of 24-hour uninterrupted process monitoring.

It is widely used in industrial production lines, water treatment pipelines, chemical process flow, circulating water systems and industrial wastewater process monitoring.

Key Advantages

Industrial grade, designed for long-term process monitoring
Good acid & alkali resistance, wide media adaptability
Anti-impact and anti-fouling, adapt to dynamic flow conditions
Multiple signal outputs for flexible system matching
Simple installation, easy cleaning and calibration
Low drift, stable performance for continuous production

Technical Parameters

Parameter	Range/Type
Measurement Range	0–14 pH
Temperature Range	0–100°C
Pressure Range	0–3 Bar, 6 Bar MAX
Temperature Compensation	NTC 2.252K, NTC 10K, NTC 22K, NTC 30K, PT100, PT1000, etc. (selectable)
Factory Slope	>95%
Membrane Resistance	<250 MΩ
Zero Potential	7 ± 0.25 pH
Response Time	<30 S
Salt Bridge Type	Special porous ceramic core
Reference Type	Double salt bridge reference
Number of Junctions	Two
Mounting Thread	PG13.5
Housing Material	Glass
Insertion Depth	120/150/225/325/425 mm (customizable)
Cable Connection	S8/S8M/S7/VP/K8S/K2, etc. (customizable)