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The SentryGSM2E-R, with embedded radio capability, provides a reliable, low cost solution for a wide range of monitoring, metering and alarm messaging applications.

This battery powered, Zone 2 ATEX approved, GSM device is ideal for multi sensor monitoring and metering using low powered radio communications with up to 32 inputs. Its Zone 0 protective interface allows for hard wiring a sensor in explosive atmospheres. Alarms, data or action messages can be sent to multiple recipients via SMS or GPRS. Sentry Telemetry's Windows-based software provides remote configuration of all variables, message recipients' etc.

Batteries and SIM card are included and the unit is factory tested with a magnetic key fob for activation when installed.


  • 1 to 3 digital inputs (1 for ATEX)
  • 2 to 32 A to D via LP radio
  • License exempt radio
  • ATEX Zone 2 approved
  • ATEX Zone 0 protective interface
  • Data and alarms sent via SMS
  • Actions programmable via SMS from PC or mobile phone
  • Remote updates via SMS
  • Standard SIM
  • Dual/tri band GSM
  • Programmable messages
  • Numerous message recipients
  • Battery operated with optional mains or solar power configuration
  • Internal/external antenna
  • Magnetic key fob activation


  • Tri band 900/1800/1900
  • 9.6 volt DC
  • Enclosure to IP67


  • R&TTE Directive 1999/5/EC
  • Low Voltage Directive EN60950
CE-approved logo CE approved
WEEE compliant logo WEEE compliant

User Defined Parameters

bullet Message frequency
bullet Message recipients
bullet Data on demand request
bullet Alarm trigger points


  • Remote control of outputs
  • Remotely interrogate device to:
bullet Check GSM signal strength
bullet Check battery voltage
bullet Simulate alarm conditions
bullet Check/save/change user defined parameters


  • What is the maximum message length? – Up to 150 characters per message that can be a combination of serial numbers, process parameter, alarm/fault text etc.
  • Is it simple to install?  - Yes; the device comes pre-fitted with battery and SIM card and is then factory tested.  Once installed with sensor, a handheld magnetic key fob activates the unit and sends the first data message to the host PC where the communication can be checked.
Remote Sensing, Monitoring & Metering

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