Code Temperature Compensation Body Operating Temperature Max Pressure (@25ºC/77ºF) Cable/Connection HI7638 automatic, 0 to 50°C with NTC sensor PEI and Stainless Steel 0 to 120°C (32 to 248°F) 5 bar (72.5 psi) 3 m (9.9’)/Color coded wires HI7638/10 automatic, 0 to 50°C with NTC sensor PEI and Stainless Steel 0 to 120°C (32 to 248°F) 5 bar (72.5 psi) 10 m (32.8’)/Color coded wires HI7638/20 automatic, 0 to 50°C with NTC sensor PEI and Stainless Steel 0 to 120°C (32 to 248°F) 5 bar (72.5 psi) 20 m (65.6’)/Color coded wires HI7639 automatic, 0 to 50°C with Pt100 sensor PEI and Stainless Steel 0 to 120°C (32 to 248°F) 5 bar (72.5 psi) 3 m (9.9’)/Color coded wires HI7639 HI7638 · HI7639 In-line Conductivity Probes with Platinum Ring These conductivity probes combine the proven four-ring potentiometric method of measuring conductivity with platinum sensors. The universally acclaimed four-ring method provides an exceptionally stable measurement over a wider range. These probes do not suffer polarization, nor do they need frequent calibration or cell changes. HI7638 and HI7639’s built-in temperature sensor allows automatically temperature compensated measurements and features easy operation and maintenance. HI7635 In-line Conductivity Probes These conductivity probes combine the proven four-ring potentiometric method of measuring conductivity with platinum sensors. The universally acclaimed four-ring method provides an exceptionally stable measurement over a wider range. These probes do not suffer polarization, nor do they need frequent calibration or cell changes. The built-in temperature sensor (select models) allows automatically temperature compensated measurements and features easy operation and maintenance. The majority of probes are provided with a 4 m cable incorporating color coded wires for easy connection to HI8936 transmitters while others provide a DIN connection. Code Temperature Compensation Body Operating Temperature Max Pressure (@25ºC/77ºF) Cable/ Connection HI7635 automatic, 0 to 50°C with NTC sensor polypropylene 0 to 80°C (32 to 176°F) 5 bar 4 m (13.1’)/Color coded wires Typical connection of the HI7635 probe and the HI8936 transmitter to the HI8931 controller. 15 Process Instrumentation 15.132 | www.hannainst.com electrodes
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