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800-620-8803 
From the manufacturer’s website:
Features
Affordable Area Monitor
Range: 0.1 to 9999 µR/hr
Compact, Integrated Design
Low Background Sensitivity
Audio & Visual Alarms
Networkable (Requires Ethernet or Webpage Interface Option)
The Model 375/1 Digital Wall-Mount Area Monitor is designed for visibility and ease of use. This monitor incorporates an internally housed 18 mm CsI scintillator with a sensitivity of approximately 120 cpm per µR/hr. It features a wall-mount chassis and a four-digit LED display that is readable from 9 meters (30 feet) away. Backlit indicators warn of low radiation (yellow), high radiation (red), instrument failure (red), and low battery (yellow), along with an alarm. A green status light indicates the instrument is functioning properly.
Parameters are protected under a calibration cover that provide access to adjusting the calibration constant, dead time correction, and alarm point parameters. Parameters are stored in non-volatile memory (retained even with power disconnected). A five-decade logarithmic analog output is provided.
Options available include remote displays, an Ethernet port, alarm relay output, and a NEMA 4 outdoor enclosure.
Note: While the detector used in this instrument is sensitive and is often used for detection of near-background levels of radiation, its nonlinear energy response means that does and exposure measurements may be over/underreported.
| Detector | 18 mm CsI detector (nonlinear energy response, see Energy Response Curve in the Graphs tab) |
|---|---|
| Sensitivity | 120 cpm per µR/hr |
| Measurement Range | 0.1 to 9999 µR/hr (alternately 0.01 to 99.99 mR/hr) |
| Display | 4-digit LED display with 2 cm (0.8 in.) characters |
| Display Units | µR/hr (other units available upon request) |
| Status Indicators |
|
| Audio | Intensity can vary from approximately 68 dB to 100 dB through operation of the external rotary baffle and the internal voltage connection. Frequency is approximately 3 kHz |
| Temperature Range | -20 to 50 °C (-4 to 122 °F) |
| Power | 9 Vdc wall-mount adapter handles any mains voltage in the world, supplied with four sets of prongs for almost any style wall receptacle |
| Battery Life | 48 hours in non-alarm condition (typical) 12 hours in alarm condition (typical) |
| Battery Charger | Battery is continuously trickle charged when instrument is connected to line power and turned on |
| Construction | Aluminum housing with ivory powder coat |
| Size (H x W x L) | 18.7 x 24.6 x 6.4 cm (7.4 x 9.7 x 2.5 in.) |
| Weight | 2.1 kg (4.7 lb) |
For internal use:
Barcodes: 18452536 & 18452537
