The Stevens-Greenspan pH Sensors provide highly accurate pH readings independent of temperature. The proven gel-filled double junction sensor tolerates rough handling while maintaining long term accuracy. Coupled with robust construction and a fully submersible design, the sensors provide excellent performance in a wide range of demanding measurement applications.

Sensor Output:

• PH 100: 4-20mA
• PH 300: RS 232 (also includes internal data logging)
• PH 1200: SDI-12 serial

Sensor Features:

• Range of 2 - 12 pH
• +/- 0.1% pH linearity
• +/- 0.2% pH accuracy
• 10 - 14V supply voltage
• 2 second warm-up to first reading

Make more accurate pH measurements with Stevens-Greenspan’s state of the art pH sensor

The Stevens-Greenspan pH Sensor offers a unique combination of advanced features:

• Innovative, optically isolated signal conditioning electronics ensure true and accurate readings at all times.
• Field proven gel-filled double junction electrode provides long term accuracy.
• Optical isolation of signal conditioning electronics enables operation in combination with other sensors without compromising performance.
• Low power energy saving design enables long term operation in remote data logging applications.
• Optional on-board data logger with a wide range of sophisticated logging features enables long term unattended operation.

The Stevens-Greenspan pH Sensor combines a rugged gel-filled electrode and robust, sealed construction to offer unparalleled reliability. Designed for low power consumption, the sensor can be operated from remote power sources for extended periods. Field experience has shown the Stevens- Greenspan pH Sensor can be left unattended for up to three months. The high reliability of Stevens-Greenspan sensors means critical measurements are not lost through sensor down time. Time wasting unscheduled site visits are therefore minimized.

At the heart of the Stevens-Greenspan pH Sensor is a gel-filled electrochemical sensor which is very selective and sensitive to hydrogen ions. Coupled earth loop currents, a frequent source of errors with high impedance pH probes, are eliminated through the use of optically isolated signal conditioning electronics. Built-in temperature compensation removes temperature related errors.