This chemical-resistant pH electrode is engineered for harsh chemical environments with strong acids, alkalis and corrosive solutions. Adopts special resistant glass membrane and durable reference system, effectively resisting erosion from various chemical reagents, solvents and industrial waste liquid.

Reinforced structure, anti-fouling and anti-scaling performance, ensures stable measurement in long-term chemical service. Built-in automatic temperature compensation, IP68 submersible rating, 3/4" NPT thread. Optional 4–20mA analog or RS485 Modbus-RTU output, widely used in chemical, pharmaceutical, electroplating and petrochemical industries.

MTW-APH2521 chemical-resistant pH electrode is engineered for harsh chemical environments with strong acids, alkalis and corrosive solutions. Adopts special resistant glass membrane and durable reference system, effectively resisting erosion from various chemical reagents, solvents and industrial waste liquid.

Working Principle

The dedicated corrosion-proof glass membrane responds to hydrogen ions in liquid to generate potential signals. Optimized liquid junction and internal structure prevent chemical penetration and electrode failure. With temperature correction, it delivers accurate and continuous pH measurement in complex chemical solutions.

Key Features

1.Excellent resistance to strong acid, strong alkali and organic chemicals.
2.Special glass bulb, not easy to be corroded or aged.
3.Anti-clogging liquid junction, adapt to viscous and chemical wastewater.
4.Automatic temperature compensation, ensure reliable measurement.
5.Wear and corrosion resistant body, low maintenance cost.
6.Standard interface, easy installation and compatible with most controllers.

Technical Specifications

Measuring Range	0.00 ~ 14.00 pH
Resolution	0.01 pH
Accuracy	±0.02 pH
Working Temp	0 ~ 100℃
Max Pressure	≤ 0.7 MPa
Output	4-20mA / RS485 Modbus RTU
Main Material	Anti-corrosion glass + PTFE / PVDF
Mounting Thread	3/4" NPT
Protection Grade	IP68

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)