Ludlum Measurements Model 133 Probe

Model 133 Series G-M Detectors

The Model 133 series is a group of high range energy compensated G-M detectors primarily used for area monitoring applications

MODEL NUMBER	PART NUMBER
133-2	47-1717
133-2-1 WATERPROOF	47-2450
133-4	47-1674
133-4-1 WATERPROOF	47-2451
133-6	47-1718
133-6-1 WATERPROOF	47-2452
133-7	47-1216
133-7-1 WATERPROOF	47-2453
133-8	47-1226
133-8-1 WATERPROOF	47-2334

Note: The waterproof versions of the above detectors include a hardwired 100' cable with "C" connector. Other lengths and connectors are available on request.

INDICATED USE: Area monitoring
DETECTOR: Halogen quenched G-M
COMPATIBLE INSTRUMENTS: General purpose survey meters, ratemeters, and scalers, area monitors
CONNECTOR: Series "C" (others available )
CONSTRUCTION: Anodized aluminum housing
TEMPERATURE RANGE: -4° F(-20° C) to 122° F(50° C)
May be certified to operate from -40° F(-40° C) to 150° F(65° C)
SIZE: 1" (2.5 cm) diameter X 4" (10.2 cm)L
WEIGHT: 0.2 lb (0.07kg)

	133-2	133-4	133-6	133-7	133-8
LINEAR RANGE W/O DTC	0.1 mR/hr 200 mR/hr	1 mR/hr 2 R/hr	4 mR/hr 6 R/hr	25 mR/hr 30 R/hr	150 mR/hr 300 R/hr
LINEAR RANGE WITH DTC	0.1 mR/hr 1 R/hr	1 mR/hr 4 R/hr	4 mR/hr 10 R/hr	25 mR/hr 100 R/hr	150 mR/hr 1000 R/hr
SENSITIVITY (cpm/mR/hr)	1000 (Cs-137 gamma)	100 (Cs-137 gamma)	30 (Cs-137 gamma)	4.2 (Co-60 gamma)	0.7 (Co-60 gamma)
ENERGY RESPONSE (60 keV - 3 MeV)	Within plus or minus 25% of true value	Within plus or minus 15% of true value			Within plus or minus 25% of true value
DEAD TIME	Typically 80 microseconds		Typically 50 microseconds
OPERATING VOLTAGE	550 volts			460 volts

Response Curves

Model 133-2 Response Curve Models 133-7 and 133-8 Response Curves