Model 12SA

microR Survey Meter with Alarm

Part Number: 48-2621

Features

• High Sensitivity to Gamma
• 0 to 3000 μR/hr Range
• Rugged
• 4-Range Analog Meter with Alarm

The Model 12SA is a high sensitivity gamma microR meter with alarm employing an internally housed 2.5 x 2.5 cm (1 x 1 in.) NaI detector. The aluminum cast 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 front-panel controls include a rotary switch for selecting the four-decade range, instrument shut-off, and battery test, an audio on/off switch, a fast/slow response switch, and a count reset pushbutton. The front panel additionally includes an alarm lamp, which is accompanied by an audible output anytime the alarm setpoint is exceeded. The Model 12SA is a complete turn-key system and includes two "D" cell batteries.

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

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

Specifications

Indicated Use	Low-level (μR) gamma survey
Detector	NaI(Tl) scintillator, 2.5 x 2.5 cm (1 x 1 in.)
Typical Sensitivity (137Cs)	175 cpm per µR/hr
Energy Response	Energy dependent
Alarm	Indicated by red lamp and audible tone
High Voltage	Adjustable from 200 to 1500 Vdc
Threshold	Adjustable from -6 to -32 mV
Linearity	±10% of true reading
Meter Dial	0 - 3 µR/hr, BAT TEST (Meter Face tab lists other available meter faces)
Controls	Rotary Selector Switch: off, battery check, range selections for x1, x10, x100, x1000 Reset Button: to zero meter High Voltage Check Button: view high voltage setting on meter face Audio Switch: on/off, built-in unimorph speaker, 60 dB at 61 cm (2 ft) Calibration Controls: accessible from front of instrument (protective cover provided)
Power	Two each "D" cell batteries (housed in externally accessible sealed compartment)
Battery Life	Exceeds 600 hours, may be checked on meter face
Construction	Cast and drawn aluminum with beige powder coat
Size (H x W x L)	22.2 x 21.6 x 8.6 cm (8.8 x 8.5 x 3.4 in.) with handle
Weight	2.1 kg (4.6 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
202-936		0 - 10 cps BAT TEST

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Options

Option	Description	Part Number
Portable Scaler Option	Adds scaler counting capability. Includes digital readout, count time selector switch, and count control button.	4464-114
Lighted Handle	Handle with LED to illuminate the instrument display.	4464-154
Shoulder Strap	Adjustable nylon shoulder strap.	4363-413
Headphone Jack	Adds headphone jack to instrument.	4464-464
Stereo/Mono Headphones	Adjustable stereo/mono headphones.	22-9313
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
• CE Certificate

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Replacement Parts

Description	Part Number
NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider	2004-033
NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider	40-5154
Detector Assembly (Includes 2004-033)	47-1574

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