Edgetech Instruments SENTRY Specifications

ISO/IEC 17025:2005 Accredited

ISO 9001:2015 Registered

The Edgetech Instruments SENTRY turn- key

measurement and alarm system features a
smart multi -sense probe that continu o u s ly
monitors the dew/frost point and pressure
of c o m p r e s s e d ai r sy s te m s to de t e c t
compressor or dryer fa ilures and system
pressure leaks.

The SENTRY features a strobe lamp and pulsing horn plus
an alarm relay contact that activate when a programmable,
low pressure or high dew/frost point alarm trip point is
detected. Either condition triggers the alarms. It also has a
local display of the measured pressure and dew/frost point
of the compressed air system plus 4 to 20 mA analog
outputs, one each for measured pressure and dew/frost
point at atmospheric pressure. The SENTRY is a complete
system, ready for out-of-the-box installation.

All Edgetech Instruments dew/frost point monitors are
manufactured and supported in the USA in a modern,
ISO 9001:2015 registered facility with ISO/IEC 17025:2005
accredited calibr ation laboratory.

Features:

• Detects upset conditions in compressed air systems

• Constantly monitors pressure and dew/frost point temperature

• Strobe lamp and pulsing audible alarms for low pressure

or high dew/frost point alert

• Displays dew/frost point and pressure on panel meter

• NIST traceable calibration certificate

• Field replaceable Smart Sensor Tip

• Alarm relay and 4 to 20 mA outputs

• Complete system, ready for installation

Compressed Air Monitoring and Alarm System

Applications:

• Compressed air headers

• Point of use compressed air

• Dry air systems for critical process

• Monitoring fluidized bed dryers

• Monitoring instrument air systems

• Pharmaceutical packaging

• Laboratories and clean rooms

• Sensitive product storage

• Monitoring purge delivery systems

The SENTRY Dew/Frost Point and Pressure Probe

Click for the SENTRY Application Note

Toll Free: 800-276-3729 Ph: 978-310-7760 Fax: [phone]

E-mail: [e-mail]

Web: www.edgetechinstruments.com

Technical Specifications

ISO/IEC 17025:2005 Accredited

ISO 9001:2015 Registered

Specifications:

Models:

SENTRY 85: Provides strobe lamp and 85 dB

pulsing audible alarm when high dew/frost point or
low pressure condition is detected

SENTRY 100: Provides strobe lamp and 100 dB

pulsing audible alarm when high dew/frost point or
low pressure condition is detected

Measuring Range (HPP125 Sensor Probe):
Standard Dew/Frost Point: -40°C to +95°C

(-40°F to 203°F )

Low Dew/Frost Point: -60°C to +95°C

(-76°F to 203°F )

Pressure: Up to 400 psia (0 to 27.6 bar)

Accuracy:

Dew/Frost Point: ±1°C for –10°C to 95°C

and ±2°C for –60°C to –10°C

Pressure: At 25°C, ±1 mbar from 600 to 1200

mbar; over -40°C to +125°C range, ±5 mbar

General:

Enclosure: IP65 water resistant/dust tight
Dimensions: 5 in H x 5 in W x 4 in D
(127 mm H x 127 mm W x 102mm D)
Weight: 3 lb. (1.4 kg)
Display: 2 Line LCD display of pressure and

dew/frost point, LED Backlit

Operating Temp.: 32°F to 122°F (0° to 50°C)
Smart Sensor Probe: Connected to control module

via 1 meter cable with quick connect

Sample Connection: 1/2” Male NPT pipe fitting;

Optional 3/4” or 1” male NPT pipe fitting

Sample Pressure: Up to 400 psia (27.6 bar)

Power & Outputs:

Power: 90 to 230 Vac ±10%, 50 to 400 Hz,

3 meter power cord provided

Analog Outputs: Two, 4 to 20 mA outputs:
Pressure of compressed air at sensor probe

in psia
Dew/frost point at 1 atmosphere pressure
Alarm Relay, 1 Form C, 3 A at 250 Vac; Alarm

mode is low pressure or high dew/frost point

Accessories:

CAM: Compressed Air Module sample chamber

for probe; provides sample flow to sensor probe,

includes a ball valve to isolate the probe from the

pressurized air source during service, 3/4 inch

NPT female pipe threaded port to compressed air

system take-off point

Rev. v5

Click for the Compressed Air Module

(CAM) Installation Procedure