Overview

Enviro Forest portable geiger-muller radiation meter can be used to detect alpha, beta, gamma and X-rays, and the built-in 2.4 in (60.96 mm) flat GM detector is highly sensitive to alpha and beta sources. The digital display can be selected in different units such as mR / hr, CPM, CPS, or mSv / hr as required. The detector automatically compensates for the dead time of the GM tube, and the anti-saturation circuit prevents interference in the strong radiation field. The detector can accurately detect minor contamination, can take a timed reading, the time setting can be from 1 hours to 40 hours, and when the radiation level reaches the value set by the user, the alarm sounds.

Features

Automatically compensates dead time
Anti-saturation circuit prevents interference

Technical Specifications

Probe	Halogen quencher GM tube, effective diameter 1.77 in (45 mm), mica window density 1.5 mg / cm3 to 2.0 mg / cm3
Display	The four-digit value is displayed by the LCD screen, and the counting lamp is a red LED lamp
Average Period	The value is updated every 3 s and the average value in the last 30 s is displayed. If the radiation intensity is increased, the average period of 30 seconds will be shortened. The user can select the minimum average period 3 s
Operating Range	0.001 mR / hr to 100.0 mR / hr, 0 CPM to 300,000 CPM, counting total 1 to 9,999,000, 0.01 μSv / hr to 1,000 μSv / hr, 0 CPS to 5,000 CPS
Efficiency	The efficiency of Sr-90 (546 keV and 2.3 MeVβ) is about 38%; The efficiency of C-14 (average 49 kev, 156 keV βmax) is about 5.3%, Bi-210 (390 keV mean, 1.2 MeV βmax) has an efficiency of about 32%; Am-241 (5.5 MeVα) has an efficiency of about 18%
Time Meter	Can be set to receive radiation time 1 min to 10 min, unit increment of 1 min, Or 10 min to 50 min, unit increment of 10 min; Or 1 hr to 24 hr in increments of 1 hr
Power Supply	One 9 V alkaline battery, 200 h in natural battery, at least 24 h at 1 mR / hr dose rate
Output	Dual micro jacks drive CMOS or TTL programs, data can be downloaded to the computer. Microjacks allow electronic checking.
Anti-Saturation	The reader can display up to 100 maximum readings on a full scale in the field
Alarm Threshold	Adjustable according to user needs.
Sound	There is a corresponding sound prompt, that can be set to mute
Spirit Sensitivity	3500 CPM / mR / hr, for 137 Cs standard sources
Precision	± 15%
Ambient Temperature	From -4.00 °F to 122.00 °F (-20 °C to 50 °C)
Volume	5.90 in × 3.15 in × 1.18 in (150 mm × 80 mm × 30 mm)
Weight	0.77 lb. (350 g)