ERK-525 Plus Emergency Kit

Radiation Detection Kit for First Responders

WB Johnson ERK 525 plusThe ERK-525 Plus Nuclear Emergency Response Kit includes the DSM-525 digital survey meter, MRSP-1 Plastic Scintillation Probe, HP-265 pancake G-M probe, an alarming, digital dosimeter, check source and holder. The dosimeter is DOSERAE-2 dosimeter to help ensure the safest dose exposures to your personnel.This emergency response kit is ideal for police, fire and rescue as well as scientific applications.

ERK-525-plus Response Kit



DSM-525 Dual Probe Survey Meter/Scalier
with digital display

The DSM-525 is a microprocessor Scalier/Rate meter with a large digital display and separate inputs for 2 detectors. The 525 has separate adjustable HV supplies for each detector and each detector can have different Dose and CPM calibrations. Inputs can have different functions: i.e. the rate meter on one input, and Scalier on the other input. A threshold that is variable from 0– 100 % on the input signal eliminates unwanted signals below preset amplitudes. RS-232 data output is provided through 9 pin connector (on request). Alarms are provided from 5 - 95% of full scale. Both probes can be connected and only require adjusting selector switch to the probe for completely automatic operation.


Input Sensitivity: 0.050 v p-p
Threshold Variable: from 0-100% of input signal
Display: 4 DIGIT X .75” Tall 19 mm) LCD W/Led BACKLIGHT
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
Scalier Ranges: 0-9,999 cps, 0-9999 cpm and 0-9999 Kcpm
Scalier 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: 6 AA, Nominal 200 hrs 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
Data output: 9 Pin Serial RS-232, Panel manual data switch

MRSP-1 Plastic Scintillation Probe Specifications

The MRSP-1 plastic scintillation probe our tissue-equivalent, microR Detector. This probe has greater accuracy and sensitivity than a sodium iodide chamber. It is sensitive to gamma radiation at the microR level between 15 keV and 2 MeV; the probe detects betas as well. The range is 0-10,000 micro R.

General:  Micro R Detector
Range: 0 - 10,000 Micro R
Energy Response: Gamma: 20 keV-2MeV
Operating Voltage: 900 vdc
Window Density: 7 mg/cm2
Dead Time: <5 μSec
Sensitive to Cs-137: 60 CPM/μR/hr
Sensitive Area: 1” (2.54cm) X 1” (2.54cm)
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: 0.5 Pounds (.23 kilos)

HP-265 G-M Pancake Probe Specifications

The 2.5 inch pancake G-M probe is ideal for general purpose survey. This G-M probe detects alpha, beta, and gamma radiation. The HP-265 measures 14C, 32P, 35S and 137Cs with notable efficiency.

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" diameter. 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

DoseRaeII Dosimeter

The DoseRAE 2 is a compact, direct-reading and alarming electronic personal radiation detector. It utilizes a diode and a scintillation crystal to detect X-ray and gamma radiation. The dosimeter provides real-time monitoring of personal dose and dose rate. The real-time radiation dose rate monitoring allows immediate reaction in case of radiation occurrences and thus reduces the radiation exposure.

Check Source and Holder

Cs-137 Check Source for Emergency Kit, nuclear by Johnson NuclearCs-137 1 uCi, 1 inch check source with holder



Waterproof Pelican case

Model 1500 pelican case for nuclear emergency kit


Nuclear Instrumentation

Dosimetry Shielding Sources Specials

Hepa Vacuums

NIST Calibrations

Marinelli Beakers

Fume Hoods


Emergency Response

Nuclear Medicine

Radiation Therapy Search Home

WB Johnson, Automess, SE International, Spectech, Tech Associates

...and more

Direct Scientific  /  tel (310) 589 0601 /   Email

contact us: en español, auf Deutsch
Open 8:00 AM - 5:00 PM Pacific Standard Time
Follow us on twitter and youtube.
visit our youtube channel
follow us on twitter
Check out our instrument demos.