Ludlum Model 3 with Model 44-9 Alpha Beta Gamma Counter
Price range: $35.00 through $545.00
This is Ludlum’s best-selling general purpose, handheld analog ratemeter known for accuracy and long lasting dependability. When connected to the Model 44-9 GM pancake detector, this system simultaneously detects alpha (α), beta (β) and gamma radiation making it an excellent choice for Medical and Health Physics applications.
The cast aluminum instrument housing with a separate battery compartment and 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 button.
Please Note: Radiation equipment rentals require a minimum 3-week lead time to ensure availability
| Daily | Weekly | Monthly |
| $35 | $155 | $545 |
- Rugged analog ratemeter
- Pancake-type, halogen-quenched GM detector
- Easy to use
- Easy reach to difficult places
- 2000 hour battery life
Model 3 Survey Meter
- METER DIAL: 0‒500 kcpm, BAT TEST
- METER DIAL: 0‒500 kcpm, BAT TEST
- CONTROLS:
- Rotary Selector: switches between instrument off, battery check, ranges: x0.1, x1, x10, x10
- Rotary Selector: switches between instrument off, battery check, ranges: x0.1, x1, x10, x10
- Reset Pushbutton: to zero meter
- Audio Switch: for audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 meters (2 ft)
- Calibration Controls: accessible from front of instrument (protective cover provided)
- CONSTRUCTION: cast and drawn aluminum with beige powder coat
- CONNECTOR: series “C”
- 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: two each “D” cell batteries (housed in externally accessible sealed compartment)
- BATTERY LIFE: typically greater than 2000 hours with alkaline batteries (battery condition can be checked on meter)
- SIZE: 16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.) (H x W x L), including handle
- WEIGHT: 1.6 kg (3.5 lb), including batteries
Model 44-9 Radiation Detector
- DETECTOR TYPE: pancake-type, halogen-quenched Geiger-Mueller
- WINDOW: 2 mg/cm² mica protected by 79% open stainless steel screen
- WINDOW AREA: 15.51 cm² (2.4 in²) active, 12.26 cm² (1.9 in²) open
- EFFICIENCY (4π): 5% for 14C; 22% for 90Sr/90Y; 19% for 99Tc; 32% for 32P; 15% for 239Pu, ≤ 1% for 99mTc; 0.2% for 125I
- SENSITIVITY (137Cs): 3300 cpm/mR/hr
- ENERGY RESPONSE: energy dependent
- BACKGROUND: 60 cpm
- DEAD TIME: 80 microseconds
- OPERATING VOLTAGE: 900 Vdc
- CONNECTOR: series “C” (others available)
- INPUT SENSITIVITY: ≥ 30 mV
- CONSTRUCTION: aluminum housing with beige powder-coat finish, stainless steel screen
- TEMPERATURE RANGE: -15 to 50 °C (5 to 122 °F), may be certified for -40 to 65 °C (-40 to 150 °F)
- SIZE: 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.) (H x W x L)
- WEIGHT: 0.5 kg (1 lb)