LUDLUM 9-4RF RF-Immune Air Ion Chamber Survey Meter (0 ~ 500 mSv/h; 1000 mg/cm2)

Detector

Detection Range: 0 to 500 mSv/h (0 to 50,000 mR/hr)

Energy Response: Within 20% of true value from 40 keV to 2 MeV

Linearity: Reading within 10% of true value 

Chamber Volume: 220 cm3 (13.4 in3)

Side Wall: 1000 mg/cm2 aluminum and acrylic

Beta Shield: Retractable 1000 mg/cm2 phenolic slide with side button control

Instrument Controls

Range Selection: Instrument Off, x10k, x1k, x100, x10, x1

Zero Adjust: One-turn potentiometer to zero reading

Battery: Pushbutton used to check battery capacity

Display Light: Toggles a white LED display On/Off

Meter

Meter Dial: 0 to 5 mR/hr, BAT TEST

Meter: 6.4 cm (2.5 in.) arc, 1 mA, pivot-and-jewel suspension

Compensation: Automatically corrects for temperature and pressure changes in atmosphere

Pressure Compensation Range: 70 to 106 kPa (20.7 to 31.3 inHg)

Power: 2 each “D” cell batteries housed in a sealed externally accessible compartment

Size (H x W x L): 23.4 x 8.9 x 21.6 cm (9.2 x 3.5 x 8.5 in.) including instrument handle

Weight: 1.9 kg (4.2 lb) including batteries

Datasheet

Manual

Video