Sentry EC Dosimeter & Rate Meter

Sentry EC Dosimeter & Rate Meter

The Radiation Alert® Sentry EC is a Personal Alarming Radiation Dosimeter & Rate Meter. This model is designed to ensure the safety of personnel that work in occupations with potential x-ray or gamma exposure.

The pocket sized unit has an energy compensated tube for a linear response to gamma and built in memory for recording data points for tracking accumulated exposure. The free SentryCom Software enables you to generate incident reconstruction for analysis. The software also permits you to easily set the vibrating and audio alert to your desired levels for dose (>1.0 mR/10 µSv) and dose rate (>1.0 mR/hr/10 µSv/hr).

Use the audio switch to choose between audible clicks with each count received or a discreet silent mode.


Energy Compensated GM Tube

Operating Range
Dose Rate: 0.1 – 15 R/hr (1 µSv/hr – .15 Sv/hr)
Accumulated Dose: 0.1 – 65 R (1 µSv – .65 Sv)

Dose Rate Linearity
Better than ±15% up to 15 R

Energy Response
Down to 20 KeV

Gamma Sensitivity
1.5 cps/mR/hr (Co60)

Typically ±15% of reading (Cs137)


Audible Alarms
Accumulated Dose & Dose Rate, 90db @ 1 ft.

Alarm Thresholds
Default: Dose 500 mR / Rate 50 mR/hr
Sievert Option: Dose 5000 μSv / Rate 500 μSv/hr Alarm and warning levels are user selectable with the Free SentryCom Software.

Switch Functions
Power, Vibrate & Audible Alert, Silent Vibrating Only Alert, and Audio Clicks On/Off.

Power Requirements
9-Volt Alkaline Battery(Included) Approx. 1500 hrs at normal background.

Temperature Range
-10° to +50°C (14° to 122°F)

10% to 70% Non-Condensing.

243 g (8.6 oz)

Anodized Aluminum Housing w/ Metal Belt Clip

106 x 67 x 28 mm (4.2 X 2.7 X 1.1 in)

Additional information


453g (1lb) (case of 6), 6.8kg (15lb), 13.6kg (30lb)