WB Johnson - NORM Meter Featured

WB Johnson NORM meter

The WB Johnson NORM meter is excellent for measuring NORM in all kinds of processing facilities.

This instrument is highly sensitive to Alpha, Beta and Gamma radiations. It has been modified for the easiest possible operator usage. Color coding and labelling to identify proper settings for each detector. Contamination alarm is pre set to set off an audible alarm at NORM contamination levels, allowing for easy identification of contaminated equipment.

Meter Body:

Input Sensitivity 0.05V
Pancake/Scintillator Switchable External Dose / CPM Switch
Display-LCD CPM, uSv/hr
LCD Refresh Rate 0.8 - 3.0 Sec adjustable
Display Backlight push button, 30 Second auto off
 Count Time Ranges 10-250 Seconds (10 second increments)
Alarms 5-95% of full scale for Dose & CPM
Diagnostics Low Battery, Overrange - Audible and Visual Alarms
Over Range Alarm Adjustable 10% above max range - dose calibration only
Electrical Non-Linearity < 5%
Response Time Fast - 10-250 Seconds (adjustable) | Slow 10-250 seconds (adjustable)
Drift <5%
Environmental -20° F[-28° C]-140° F[60° C] | 5-95% RH IPX4 Housing
Audio (click per event) On-Off switch on front panel
Battery 6 "AA" Alkaline-400 hours nominal
Circuitry Digital Microprocessor Controlled
Dimensions 5.25" (14cm) H x 4" (10cm) W x 7" (18cm) L
Weight 2.5 lbs. (1.2 Kilos) w/Batteries
Data Output (optional) 9 Pin Serial RS-232 - Panel switch manual data extraction (optional)


Pancake Probe:


Energy Response Alpha - 3.5 meV min, Beta - 1 keV min, Gamma - 20 keV-2 meV
Operating Voltage 900vdc
Window Density 1.6 mg/cm3
Dead Time 20 uSec
Sensitivity (Cs-137) 3300 CMP/mR/hr
Sensitive Area 15 cm2
Environmental -20°F (-28°C) - 140°F (60°C) | 5-95% RH
Circuitry 100% Digital Microprocessor Controlled
Dimensions 2.74" (7cm) Dia x 5.511" (28cm) L
Weight 1lb. (.5Kilos)
Construction Cast Aluminum & Stainless Steel


Scintillation Probe:


Operating Voltage 600-900 vdc
Wall Thickness 40 mg/cm2
Range 0-50 uSv/hr
CPM -mr/hr(Cs-137) 175 cpm
Energy Response 60keV - 2 MeV gamma
Nominal Background 1800 cpm
Sensitive Area 1" x 1"
Dimensions 1 7/8" dia x 6" L
Environmental -20° F[-28° C]-140° F[60° C] | 5-95% RH non-condensing - IPX4
Weight 8oz