Ludlum Model 19 MicroR (μR) Ratemeter
Price range: $25.00 through $405.00
The Model 19 is uses an internally-mounted scintillation detector for optimum performance in locating and measuring low-level (near background) gamma radiation. Rugged construction details include waterproof and dust-proof seals and boots for bezel and controls. Calibration controls, including a potentiometer for each of the five measurement ranges, are easily accessible from the front panel. A high-voltage (HV) test control provides rapid plateau testing of the detector.
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. The Model 19 includes two “D” cell batteries making a complete turn-key system.
Note: While the detector used in this instrument is sensitive and is often used for detection of near-background levels of radiation, its nonlinear energy response means that dose and exposure measurements may be over/underreported.
Please Note: Radiation equipment rentals require a minimum 3-week lead time to ensure availability
| Daily | Weekly | Monthly |
| $25 | $115 | $405 |
- High sensitivity to Gamma
- 0-5000μR/hr. range
- Rugged construction
- Splash proof protection for outdoor use
- 2000 hour battery life
- Meter light
- CE Certified
- INDICATED USE: low-level (μR) gamma survey
- MEASUREMENT RANGE: 0–5000 μR/hr (for μSv/h, use Model 19
Series 8 (P/N: 48-2582) - DETECTOR: internal 2.5 x 2.5 cm (1 x 1 in.) NaI(Tl) scintillator
- SENSITIVITY: approximately 175 cpm/μR/hr (137Cs gamma)
- ENERGY RESPONSE: energy dependent (see curve at right)
- LINEARITY: reading within 10% of true value
- METER: 6.4 cm (2.5 in.) arc, 1 mA analog type
- METER DIAL: 0–25 μR/hr, 0–50 μR/hr, BAT TEST, High Voltage Test
- CONTROLS
- ROTARY KNOB SELECTOR: 0–25, 0–50, 0–250, 0–500, 0–5000 μR/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)
- WORKING ENVIRONMENT: splash proof 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 “D” 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 powder coat finish
- SIZE: 15.2 x 8.9 x 21.6 cm (6.0 x 3.5 x 8.5 in.) (H x W x L), not including instrument handle
- WEIGHT: 2.04 kg (4.5 lb), including batteries