LUDLUM 3-97 Gamma Survey Meter (175 cpm per µR/hr)

Internal Detector:

Type: NaI(Tl) scintillator, 2.5 x 2.5 cm (1 x 1 in.)

Sensitivity: Typically 175 cpm per μR/hr (¹³⁷Cs gamma)

High Voltage: Adjustable from 200 to 1200 V

External Detector:

Type: Model 44-38 energy compensated GM detector (others available)

Sensitivity: Typically 1200 cpm per mR/hr (¹³⁷Cs gamma)

High Voltage: Factory set for 900 V, may be adjusted from 400 to 1500 V

Linearity: Reading within ± 10% of true value with detector connected

Meter Dial: 0 - 2 mR/hr, 0 - 2.4 kcpm, BAT TEST (other meter faces available)

Meter: 6.4 cm (2.5 in.) arc, 1 mA analog type

Threshold: 30 mV ± 10 mV

Temperature Range: -20 to 50 °C (-4 to 122 °F)

Power: 2 "D" cell batteries (housed in externally accessible sealed compartment)

Size (H x W x L): 24.1 x 8.9 x 21.6 cm (9.5 x 3.5 x 8.5 in.) with handle

Weight: 2 kg (4.4 lb) including batteries and detector, 1.4 kg (3 lb) alone

Datasheet

Manual