Ludlum Ion Chamber Survey Meter (Model 9DP)
The Ludlum Model 9DP, Pressurized ion chamber meter, provides highly sensitive measurements of exposure and exposure rate. It can simultaneously display the exposure rate and integrated value or the highest rate seen by the instrument. The integrated value can be reset (if desired) using one of the four convenient front‐panel mounted buttons.
Features
- 0 to 50 mSv/h (0 to 5 R/hr) Range with μR/hr Sensitivity
- Sunlight Readable Color Display
- Auto Zeroing & Ranging
- Rechargeable Batteries
- Alarming Capability
- Rate, Integrate & Peak Hold Readouts
- Data Logging
- USB Connectivity
- Free Firmware Updates through Internet
Specifications
| RADIATION DETECTED | gamma & X‐rays above 25 keV; beta above 1 MeV |
| OPERATING RANGES | With R/hr units: 0–500 μR/hr, 0–5 mR/hr, 0–50 mR/hr, 0–500 mR /hr, 0–5 R/hr With Sv/h units: 0–5 μSv/h, 0–50 μSv/h, 0–500 μSv/h, 0–5 mSv/h, 0–50 mSv/h |
| CHAMBER VOLUME | 230 cm3 (14 in3) volume pressurized to 8 atmospheres (117 psi) |
| ACCURACY | +/‐10% |
| RESPONSE TIME | 5 seconds in lowest range, 2 seconds in all other ranges, when measuring from 10% to 90% of final value |
| MEASUREMENT READOUTS | simultaneous display of rate, integrated reading, and highest rate (peak hold) |
| LCD DISPLAY | 8.9 cm (3.5 in.) diagonal, 240 x 320 (H x W) pixels, TFT active matrix, 262,000 colors, 220 cd/m2 |
| ALARMS | two levels of radiation alarms available, each are user programmable |
| AUTOMATIC FUNCTIONS | auto ranging, auto zeroing, auto LCD backlighting |
| AUDIO OUTPUTS | built‐in unimorph speaker, > 60 dB at 0.6 meters (2 ft.) |
Electronic Personal Dosimeter (Model 23-1)
The Model 23‐1 Electronic Personal Dosimeter (Ludlum) is a solid and lightweight (55.9 g/2 oz) pen‐type personal dosimeter. It can be used for measuring gamma or X‐ray radiation in medical and laboratory environments or other areas where personal radiation monitoring is desired or required.
Key Features
- 600 record data logging option available
- low weight and slim design
- audio alarm
- silicon semiconductor detector
- gamma and X‐ray (35 keV to 3 MeV)
Personal Radiation Monitor (Model 25)
The Model 25 is a conveniently small‐sized device designed to warn users any time they are in a potentially harmful radiation environment. The unit will automatically alarm with a loud audible signal and blinking display when either the dose rate (0.01 mR/hr to 999 R/hr) or accumulated dose (0 to 1999 R) set points are exceeded.
Ludlum Digital Area (Zone) Monitor (Model 375)
The Model 375 is a versatile, compact, and very affordable digital electronic controller designed for monitoring radiation in areas. Its simple design accommodates many different detectors suiting a wide variety of applications, and is equipped with a local readout and alarms. These versatile units may also be connected to an optional auxiliary indicator/annunciators for alerting personnel at remote locations.
- programmable units of measure and alarms
- battery backup
- four‐digit LED display with two cm digits
- displays μR/hr, mR/hr, R/hr, μSv/h, mSv/h, Sv/h, μrem/hr, mrem/hr, rem/hr, cpm, cps, and others
Ludlum Neutron Survey Meter (Model 30-7)
The Model 30‐7 is a handheld, lightweight neutron dose detector. The operator is able to adjust the viewing angle of the meter to maximize a comfortable viewing angle.
Key Features
- Neutron Dose Rate & Under 4.5 kg (10 lb)
- Adjustable Viewing Angle for Display Unit
- Moderated Neutron Detector
- Range: 0–100 mSv/h (0–10,000 mrem/hr)
- Display Unit Detaches for Greater Versatility
- Low‐Weight Unit Provides Same Readings as Standard REM‐ball from Bare AmBe and Lower Energies
- Includes Adjustable Shoulder Strap
Ludlum Survey Meter (Model 9-3)
The Ludlum 9‐3 ion chamber is a rugged air ionization chamber for performing beta‐gamma dose rate measurements over a five‐decade span ranging from background to 50,000 mR/hr (500 mSv/h). The chamber wall, including the instrument case, is 1000 mg/cm2. A 1000 mg/cm2 retractable beta shield allows beta measurement with a 7 mg/cm2 window. The six‐position switch selects Off, x10K, x1K, x100, x10 and x1.
Arrowtech Analogue Pocket Dosimeter & Charger
The Direct‐Reading Dosimeter is a pocket‐size, carbon‐fiber electroscope with an ion chamber for detecting and indication of integrated exposure to Gamma and X‐Ray radiation. It has a thin wall which permits the penetration and detection of radiation. This model comes with a hardened sapphire window that won't scratch even in the toughest of conditions.
Radiation Detected: Gamma and X‐Ray from 16 keV to 6 MeV
Range: 0‐200mR
Detector: Fiber‐Electrometer mounted in an Electrically Conductive Plastic Ion Chamber Detector Housing: Very low permeability
plastics ‐ Hermetically‐Sealed
Accuracy: +/– 10% of true exposure
Model 909B Dosimeter Charger: The Model 909B Charger LED Reading Light reduces re‐ zeroing time and effort by eliminating the need to remove the dosimeter from the Charger for reading. Simply view the scale while the dosimeter is resting lightly on the charger contact after re‐zeroing.
451P Pressurized μR Ion Chamber Radiation Survey Meter
The auto‐ranging 451P ion chamber radiation survey meter features a pressurized ionization chamber, providing enhanced sensitivity (μR resolution) and improved energy response to measure radiation rate and dose from x‐ray and gamma sources.
Key Features
- High sensitivity μR measurements of rate and dose simultaneously, with the capability to record peak rate
- Ergonomic, anti‐fatigue handle with replaceable grip, wrist strap and tripod mount
- Programmable flashing LCD display and audible alarm
- Easily‐accessible battery door (operated by two 9‐volt alkaline batteries) on the outside of the bottom case
- RS‐232 communications interface with optional Windowsbased Excel add‐in for data logging
- Available with dose equivalent energy response (SI units)
Product Specifications
| Radiation detected | Beta above 1 MeV, Gamma and x ‐rays above 25 keV |
| Operating ranges | 0 to 500 μR/h or 0 to 5 μSv/h 0 to 5 mR/h or 0 to 50 μSv/h 0 to 50 mR/h or 0 to 500 mSv/h 0 to 500 mR/h or 0 to 5 mSv/h 0 to 5 R/h or 0 to 50 mSv/h |
| Accuracy | Within 10% of reading between 10% and 100% of full‐scale indication on any range, exclusive of energy response. |
451B Ionization Chamber Survey Meter with Beta Slide
The auto‐ranging 451B ion chamber survey meter measures radiation rate and accumulated dose from beta, gamma and x‐ray radiation sources.
Product Specifications
| Radiation detected | Alpha above 7.5 MeV, Beta above 100 keV, and Gamma above 7 keV |
| Operating ranges | 0 to 50 R/h |
Digital Pocket Dosimeter (Bleeper)
The Bleeper is a simple, convenient instrument for alerting personnel to the presence of x‐ray or gamma radiation. The instrument operates continuously and provides a clear, audible indication of dose rates. While it produces a “bleep every 15 minutes for normal background radiation, the frequency of the “bleeps increases with the dose rate until a continuous tone is achieved in high radiation fields.
| Sensitivity to background radiation: | Approx. 1 bleep per 15 minutes. 1 mR/hr: Approx. 1 bleep per 20 seconds. 100 mR/hr and up: Continuous signal (to at least 6000 R/hr) |
| Energy range: | 45 keV/h to 6 MeV |
