Model 192

microR Survey Meter

Part Number: 48-2945

Features

• High Sensitivity to Gamma
• Range: 0 to 50 μSv/h (0 to 5000 µR/hr)
• Rugged
• 4-Range Analog Meter
• Dual Action Alarm

The Model 192 is a high-sensitivity gamma μR ratemeter employing an internally housed 5.1 x 2.5 cm (2 x 1 in.) NaI(Tl) detector. This instrument supports two types of alarms: a user adjustable fixed point alarm and a deviation alarm that activates at levels above a floating background. An alarm light is mounted to the front panel and is accompanied by an audio signal.

The front-panel controls include a rotary switch for selecting one of four ranges, instrument shut-off and battery test, an audio on/off switch, a fast/slow response switch, and a reset button. The cast aluminum instrument housing with a separate battery compartment and accompanying metal handle offer an industrial robustness and quality that promote long-lasting protection and instrument life. The Model 192 is a complete turnkey system and includes two "D" cell batteries.

• Specifications
• Meter Faces
• Options
• Documents
• Replacement Parts

• Specifications
• Meter Faces
• Options
• Documents
• Replacement Parts

Specifications

Application	Low-level (microR) gamma survey
Detector (D x L)	NaI(Tl) scintillator, 5.1 x 2.5 cm (2.0 x 1.0 in.)
Detection Range	0 to 50 µSv/h (0 to 5000 µR/hr)
Sensitivity (137Cs gamma)	Typically 650 cpm per µR/hr
Energy Response	Energy Dependent
Linearity	Reading within 10% of true value
Meter Dial	0 to 5 µR/hr, BAT TEST (Meter Faces tab lists other available meter faces)
Meter	6.4 cm (2.5 in.) arc, 1 mA analog type
Controls	Rotary Selector: Switches between instrument off, battery check, ranges: x1, x10, x100, x1000 Response Switch: Toggles between FAST (4 s) or SLOW (22 s) from 10% to 90% of final reading Reset Pushbutton: To zero meter, and also re-accumulate background data and recalculate the alarm point Audio Switch: For audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 m (2 ft.) Calibration Controls: Accessible from front of instrument (protective cover provided)
Alarms	This instrument incorporates dual action, latching type alarms: A fixed alarm point that can be set at any point from 10% of full scale to full scale, and is indicated by a constant audible tone, and the lamp turning on. A quick deviation alarm that is based on background radiation levels. When the instrument is turned on, it takes an 8 s measurement of background radiation levels and determines a deviation alarm setting. If the radiation level exceeds this setting, the alarm audio will beep every 1/8 s, and the lamp will flash.
Battery Life	Typically 600 hours with alkaline batteries (battery condition can be checked on meter)
Size (H x W x L)	21.6 x 8.9 x 22.4 cm (8.5 x 3.5 x 8.8 in.) with handle
Weight	2.3 kg (5 lb), including batteries

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Meter Faces

This table lists the most commonly used meter faces. Others are available upon request.

 

Meter Face	Image (click to view larger)	Description
202-912		0 - 0.05 µSv/h BAT TEST
202-923		0 - 50 nSv/h BAT TEST
202-939		0 - 40 cps BAT TEST

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Options

Option	Description	Part Number
Overload Indicator Option	Adds Overload indicator with a light.	4464-130
Detector Clips	Stainless steel clip attaches to instrument handle or case facilitating one-handed carrying of instrument and detector.	Depends on detector.
Lighted Handle	Handle with LED to illuminate the instrument display.	4464-154
Shoulder Strap	Adjustable nylon shoulder strap.	4363-413
Transport & Storage Case - Small	Rugged, dust- and waterproof transport and storage case.	2311062
Plastic Disk Check Sources	General purpose check sources used to check instrument response.	Depends on source material and activity.

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Documents

• Data Sheet
• Product Manual - English
• Product Manual - Spanish
• CE Certificate

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Replacement Parts

Description	Part Number
Detector Assembly	47-2951

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