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EdgetechSentryOverview

SENTRY-Plus/Pro - Compressed Gas Alarm System - OVERVIEW
by EdgeTech Instruments

The SENTRY-Series Compressed Gas Alarm System is designed to detect low pressure or high dew point conditions within compressed air / dryer systems. It is typically installed at the main compressor/ dryer header, but in many moisture sensitive processes, the SENTRY is also installed at the point of use.

The SENTRY is similar to the SENTINEL Humidity Measurement Transmitter in that they both incorporate a sensor control display module with the four-measurement parameter capability of the HP125 Series Humidity Probe (RH, Temperature, Pressure and Dew Point).  The SENTRY adds audible and visual alarm functionality. 

The table below is a summary of the features of both versions (SENTRY-PLUS and SENTRY-PRO):

 FEATURE
SENTRY-PLUS
SENTRY-PRO
  • Wireless/Bluetooth communication
X
  • USB port
X
  • Data Logging
X
  • Single Power-On relay (Form-A Contact)
X
  • (4) Configurable 4-20 mA outputs
X
  • (2) configurable 4-20 mA outputs
X X
  • (4) configurable 0 to 10 Volt analog outputs
X X
  • Relative humidity sensor & measurement
X X
  • Temperature sensor & measurement
X X
  • Optional absolute pressure or barometric pressure sensor & measurement
X X
  • Calculated dew point measurement
X X
  • Calibrated field-replaceable “Smart Sensor Tip”
X X
  • Sintered metal filter sensor guard
X X
  • NIST traceable calibration
X X
  • Two-line LCD display
X X
  • Two configurable relay alarms (FORM-A Contacts)
X X
  • Simulated Strobe & Pulsed Beep for Loss of pressure or High Dew Point (based on the set points)
X X
  • Model 85 features 85dB audible pulsed beep with mute switch;
  • Model 100 features 100dB audible pulsed beep with mute switch
X X
  • IP65 water-resistant/dust-tight ABS plastic wall-mount enclosure
X X
  •  NPT pipe thread fitting; ½” NPT(M) standard; ¾” & 1” NPT (M) optional
X X
  • 24 VDC operation, with universal 120/220 VAC option
X X