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  • Ludlum Model 12SA microR Survey Meter with Alarm

$2,270.00 $1,135.00

2 in stock

SKU: 4169585543-1 Product Type: , Vendor:

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.

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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)
  • 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

Additional information

Weight 7 lbs

12SA (with Alarm)