Ludlum
Ludlum Model 19 MicroR/Ratemeter
Pine Item #51518
The Model 19 is a highly sensitive gamma R/meter employing an internally housed, 2.5 cm diameter by 2.5 cm thick (1.0 x 1.0 in.) NaI detector. The measuring range is 0-50 v/h (0-5000 R/hr). The cast aluminum instrument housing with its 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 five-decade range and instrument shut-off, an audio on/off switch, a fast/slow response switch, and pushbuttons for activating the meter lamp, high-voltage display, battery test, and count reset.
Controls
- Rotary knob selector: 0-25, 0-50, 0-250, 0-500, 0-5000 r/hr, instrument off
- Response: toggle switch for fast (4 seconds) or slow (22 seconds) from 10% to 90% of final reading
- Audio: built-in unimorph speaker with on/off switch (greater than 60 db at 0.6 meters [2 ft])
- High voltage: pushbutton to display hv setting on meter
- Battery: pushbutton checks battery voltage
- Reset: pushbutton to zero meter
- Lamp: pushbutton to activate meter light
- Calibration controls: accessible from front of instrument (protective cover provided)
Equipment available for both rental and purchase
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Specifications
Manuals, Data Sheets & Software
| INDICATED USE: | low-level (R) gamma survey |
| MEASUREMENT RANGE: | 0-50 Sv/h (0-5000 R/hr) |
| DETECTOR: | 2.5 x 2.5 cm (1 x 1 in.) NaI (Tl) scintillator |
| SENSITIVITY: | 17500 cpm/Sv/h (175 cpm/R/hr) (137Cs gamma) |
| ENERGY RESPONSE: | energy dependent |
| LINEARITY: | reading of true value |
| METER: | 6.4 cm (2.5 in.) arc 1 mA analog type |
| METER DIAL: | 0-25 R/hr 0-50 R/hr BAT TEST High Voltage Test |
| WORKING ENVIRONMENT: | splashproof shields for outdoor use |
| TEMPERATURE RANGE: | -20 to 50 °C (-4 to 122 °F) may be certified for operation from -40 to 65 °C (-40 to 150 °F) |
| POWER: | 2 each cell batteries (housed in sealed compartment that is externally accessible) |
| BATTERY LIFE: | typically 2000 hours with alkaline batteries (battery condition can be checked on meter) |
| CONSTRUCTION: | cast and drawn aluminum with beige polyurethane enamel paint |
| SIZE: | 15.2 x 8.9 x 21.6 cm (6.0 x 3.5 x 8.5 in.) (H x W x L) without handle |
| WEIGHT: | 2.04 kg (4.5 lb) including batteries |