Sensorex SD7420CD Differential pH Probe, Direct 4-20mA Output

Overview

Applications such as pulp and paper or dye manufacturing and industrial wastewater treatment may expose pH probes to harsh conditions and chemicals. A differential pH probe utilizes a special measurement technique, which extends the working lifetime of the sensor in challenging applications. Replacing the sensor reference ( salt bridge ) and buffered electrolyte solution can extend working lifetime, which saves timely, costly replacements. Our 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. Utilizes differential measurement technology for extended sensor lifetime No transmitter or controller required Easy and infrequent maintenance Constructed of chemically-resistant Ryton ® Polyphenylene Sulfide (PPS) Built-in automatic temperature compensation Two Year limited Warranty

Specifications

Documentation

Specifications reproduced from the manufacturer's published product information (sensorex.com), retrieved 18 August 2026. Sensorex is a trademark of its owner. Confirm all specifications with ForeverPure before purchase.