Alarming Radiation Survey Meter / Scaler with Pancake G-M and Flat Response, Plastic Scintillation probes
The NORM-PKP system features the DSM-525 Scaler / Ratemeter connected to a Geiger-Mueller Pancake Probe for counts, and the MRSP-1 Plastic Scintillation probe for gamma dose (uR/hr or uSv/hr). The combination of the two probes is ideal for measuring NORM and TENORM radiation. The MRSP-1 Plastic Scintillation probe offers a near flat energy response. This significantly reduces over-response to lower energy gammas, resulting in more accurate measurements, and few false alarms. Other detectors, such as Sodium Iodide, dramatically over-respond to low energy gamma. The pancake G-M and plastic scintillation probes are simultaneously connected to the instrument. The user can easily switch between them, without having to power the instrument down. The DSM-525 features an oversized, auto-ranging digital display that indicates counts, dose, display error indications, and audible/visual alarms. The scaler function allows the user to accumulate counts over a given period of time. Scaler interval is user user adjustable. The efficiencies of the pancake G-M detector for the following isotopes are approximately: 5% for Carbon-14; 22% for Strontium-90/Yttrium-90; 19% for Technetium-99; 32% for Phosphorus-32; 15% for Plutonium-239.
Notes: NORM is an acronym for Naturally Occurring Radioactive Material. TENORM is an acronym for Technologically Enhanced Naturally Occurring Radioactive Material resulting from human activity that has concentrated the radioactive exposure by making the radioactive material more accessible to human contact.
Dual Probe DSM-525 Radiation Survey Meter Specifications
Input Sensitivity 0.05 Volts
Units: CPM, mR/hr, KCPM, CPS, uR/hr, R/hr, uSv/hr, mSv/hr, Sv/hr
Threshold Variable from 0-100% of input signal
Display 4 Digits 19 mm high, LCD with Led Back Light
Display Back light Push Button ON for 30 seconds Auto Off
Dose Ranges # 1 Probe 0.0 μR/hr to 9999 R/hr & 0.0 μSv/hr to 999.9 Sv/hr
Dose Ranges # 2 Probe 0.0 μR/hr to 9999 R/hr & 0.0 μSv/hr to 999.9 Sv/hr
Scaler Ranges 0-9,999 cps, 0-9999 cpm & 0-9999 Kcpm
Scaler Count Time Ranges 10 second increments to 2500 seconds
Calibration Controls Standard 12 turn Potentiometer for each range
Range Adjustment Auto-ranging
Electrical Linearity ±5%
Response Time Slow: 20 seconds FS, Fast: 4 Seconds FS
Drift <5%
Environmental -20 deg F (-28 deg C)-140 deg F (60 deg C) | 5-95% RH IPX4 Housing
HV 1 & 2 ( Separate Adjustment) Adjustable 300-1500 VDC | Regulation ±1%
Audio Front panel switch—water & solvent resistant
Battery: six AA batteries, Nominal 200 hours operation
Dimensions 5.5" (14cm) H X 4" (10cm) W X 7" (18cm) L
Weight 2.5 lbs (1.1kilo) W/ Batteries
Construction Heavy Duty Cast Aluminum & Stainless Steel
Alarm 5—95% of full scale
MRSP-1 1"x1" Plastic Scintillation Detector Specifications
General: Micro R Detector
Range: 0 - 10,000 Micro R
Energy Response: Gamma: 40 keV-2MeV
Operating Voltage: 600 - 900 vdc
Window Density: 7 mg/cm2
Dead Time: <5 μSec
Sensitivity to Cs-137: 100 CPM/μR/hr
Sensitive Area: 1.5” X 1”
Environmental: -20°F (-28° C)— 140°F (60° C) — 5 - 95% RH, IPX4 Housing
Dimensions: 1.875” (4.76cm) Diameter X 6” (15.2cm) Long
Weight: 8 0z
HP-265 Pancake Geiger Mueller Probe Specifications
Description: Long life halogen pancake G-M detector with 1.6 mg/cm2 End Window
Efficiency (4pi geometry): Typically 5%-C-14; 22%-Sr-90/Y-90; 19%-Tc-99; 32%-P-32; 15%-Pu-239, Gamma dose to 200 mR/hr (Based on 137Cs calibration)
Operating Voltage: 900 vdc
Window Thickness: 1.6mg/cm2
CPM/mR/hr: (137CS): 2,500
Energy Response: 3.5 MeV alpha, 20 MeV gamma, 100 keV beta
Sensitive Area: 15 cm2
Finish: Polyurethane Coated Aluminum
Dimensions: 2.75" dia. X 11" long
Weight: 16 ounces
Environmental: 20º - 60ºC, 5% - 95% RH non-condensing---IPX4
Construction: Polyurethane coated aluminum probe housing, nylon coated stainless steel probe clip
