Compressed Air Relative Humidity Temperature and Dew Point
Compressed air is often required to have a low humidity level. Measuring the dew point (DP) of water vapour in the compressed air that circulates in the system has many advantages. The HP480 and HP481 probes are designed specifically for this purpose.

  • Prevents corrosion of metal pipes.
  • Prevents the formation of ice inside pipes which can lead to obstruction of the pipes.
  • Prevents bacterial growth.
  • Reduces maintenance costs of pneumatic drives, by maintaining the proper lubrication of moving parts.
  • Improves the quality of products coming in contact with the air.
Specification of Digital ISFET pH Probe
Model OEM 737
pH temp. compensation ATC 10 - 50C
pH Range 1 - 14 pH +/- 0.02
Accuracy +/- 0.02
Ambient Temp Range 0 - 40C
Supply Voltage +4.8 to 5.2 VDC, 7-15mA
Calibration Single point pH7 at both factory and point of use
Output Signal
RS232 TTL Level (3.3 V) | Bits per second: 2400 | Databits: 8 | Parity: None | Stopbits: 1 | Datatransport: None
Materials PEEK (polyetheretherketone)
Dimensions Tip Diameter - 12mm
Shaft length to tip 80 mm
Handle diameter 16 mm
Handle length 62.8 mm
Operating conditions Maximum static pressure - 2 bar
Temperature range 0 - 40 degrees C
Digital pH reported values The data value is the pH (millivolts) with the following ASCII
string format +123. After calibrating in pH7 the digital <value> will be +500
Ordering Information OEM-737 ISFET pH probe
Model Description   RFQ
OEM-737 Probe with 3 m cable open wire ends (needs 5V power supply )   E-mail

Topac Inc.
781 740 8778

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