Surface Survey Meter

Description

This compact 3-range surface rate meter is equipped with an internal 2-inch diameter pancake GM detector and built-in speaker. The detector’s thin window is recessed and protected by an aluminum grill. Its small size, light weight, and one-hand operation make this unit an ideal tool for surveying bench tops and other surfaces, and for checking hands and clothing for radioactive contamination. The meter face reads in both cpm and mR/h. Anti-saturation circuitry keeps meter needle at full scale in high radiation fields.

Features

Easy contamination monitoring of bench-tops, clothing, and hands
Monitors alpha, beta, and gamma
Built-in pancake detector
Range: 0 to 50,000 cpm, 0 to 15 mR/hr
Three multiplier ranges: x1, x10, x100Built-in speaker
Anti-saturation circuit prevents false “zero” readings
One-handed operation

Specifications

Meter Dial: 2.5” (6 cm) rectangular
Ranges: Three linear: 0-500; 0-5,000; 0-50,000 cpm (0-0.15; 0-1.5; 0-15 mR/h)
Switch Positions: Off, Battery Test, X100, X10, X1
Audio: Internal speaker
Detector: Halogen-quenched pancake GM tube
Diameter: 2’’ (5 cm)Window Diameter: 1.75” (4.5 cm)
Window Thickness: 1.5 mg/cm2
Background: Typical 50 cpm
Efficiency: 100% for all betas and alphas that have the energy to penetrate the thin window
Gamma Sensitivity: Nominal is 3000 cpm/mR/h (based on Cs 137)
Calibration: Single master calibration potentiometer, individual potentiometers for each range
Voltage: 900V nominal
Current Drain: 3 mA typical
Power: 9-volt battery (Eveready 1222 carbon, E146X mercury, or equivalent)
Battery Life: Typically 100 hours under normal operation
Feet: Neoprene feet for placement on surface without contaminating bottom surface of unit
Handle: Swivel type, polished anodized aluminum
Dimensions: 3” w x 5.25” l x 2.25” h (8 x 13 x 6 cm) excluding meter and handle
Weight: 22 oz (625 g)