ECD Model S88 hazardous location sensors

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The Model S88 Intelligent Sensors range, from ECD, includes pH, ORP, ion selective, dissolved oxygen, conductivity and resistivity sensors. The range features two universal sensor designs: insertion/submersion or valve retractable with a flared end to prevent blowout. The sensors have 316 stainless steel housings, although various materials of construction are available to maximise sensor performance while minimising cost of ownership.

The pH sensors convert the analog signals from the electrode cartridge into a digital protocol that allows two-way communication with the transmitter. The identity of the sensor, measurement type and serial number are stored in the sensor’s memory along with three calibration registers. When connected to an ECD digital analyser, the sensor’s information is uploaded to the analyser. This configures the displays and outputs of the transmitter to the values appropriate to the sensor’s measured parameter.

The insertion sensor uses a ¾″ MNPT compression fitting as the process connection. This allows a variable insertion length to accommodate installation in pipe tees or flow cells, or through tank walls. If the fitting is reversed, the sensor can be installed in a stand pipe for submersion into a tank.

The valve-retractable sensor uses a 1″ ball valve with a 1″ NPT process connection. Loosening the rear compression fitting allows the sensor to slide freely through the ball valve but stop at the compression fitting for either insertion into the process or retraction from the process.