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Geiger Counter Accessories

Digital Meter Adapter for Analog Geiger Counters

Digital Meter Adapter

The New Digital Meter Adapter is now a universal expansion module. It is a combination of the original Digital Meter Adapter, RS 232 interface adapter & Random Number Generator Adapter. The new DMAD has all three functionalities in one module to enhance the capabilities of Geiger Counters.

DMAD Digital Readout and Resolution

Countable Pulse Resolution & Range 1 Count Per Minute (CPM) - 9,360 Counts Per Second (CPS)
Radiation Resolution & Range 1.0 uR/hr - 655 mR/hr
(Metric) .01 uSv/hr - 6.5 mSv/hr

Shown with optional stand (not included)

LCD Display 16 character by 2 line LCD (liquid crystal display) with back light provides easy to read output.

May be Purchased as a kit or assembled and tested.Acrylic DMAD stand

More Information

DMAD-04 - $59.95
Digital Meter Adapter Kit (Kit Requires Assembly)

DMAD-04A - $89.95
Digital Meter Adapter (Assembled and Tested)

*Requires Analog Geiger Counter with pulse output GCK-01, GCK-02 or GCA-03 or equiv.

Acrylic Stand - $10.95

Geiger Counter Wand

Geiger Counter Wand

The Geiger Counter wand utilizes a thin mica window GM tube that allows the detection of alpha radiation as well as beta, and gamma radiation. Operating range is 450-600 volts, the recommended voltage is 500 volts.

The physical dimensions of the wand are approximately .85" diameter and 5.75" long. Approximately three feet of shielded cable connects the wand and a mini din plug.

For specifications on the GM Tube used in the GCW-01 see:

Wand info

GM tube specifications

GCW-01 - $124.95
Geiger Counter Wand

GCW-02 - $114.00

Geiger Counter Wand

Radiation Shields for Wands

Radiation Shields for Wands

These radiation shields friction fit on the open end of the Geiger Counter wand. Each shield helps to block radiation from reaching the internal GM tube inside the wand.

The shields are useful in performing nuclear tests and experiments.

Radiation shields only compatable with the GCW-01 Wand . The paper shield blocks alpha radiation, while permitting beta and gamma radiation. The aluminum shield attenuates beta radiation and the lead shield attenuates gamma radiation. Shields may be purchased separately or in a set.

Radiation Penetration Calculator

SHD-02 - $12.95 
Paper Radiation Shield 

SHD-03 - $12.95 
Aluminum Radiation Shield 

SHD-04 - $12.95 
Lead Radiation Shield 

SHD-05 - $36.95 
Radiation Shield Set (Paper, Al, Pb) 

Sled Isotope Holder

Sled Isotope Holder Configuration 1The Geiger counter wand base provides a stable platform to hold the Geiger counter wand for experiments. The physical dimensions of the base are 2" wide by 12" long. The length of the base has markings in both metric and imperial.

The sled isotope holder provides a stable and moveable platform for radioactive isotopes 1" diameter discs. The sled isotope holder is available in two sizes:
One that holds 1/8" thick discs and the other to hold 1/4" thick discs.

More Information

SIHB-01 - $39.95
Sled Isotope Holder & Base (2 piece set)
BASE-01 - $30.00
Base for wand ONLY
SLED-1/8 - $14.95
1/8" Radioactive Isotope Holder
SLED-1/4 - $14.95
1/4" Radioactive Isotope Holder

Geiger-Muller Tube

GMT-01 GMT-01

Thin mica window detects alpha, beta, and gamma radiation. Operating range is 450-600 volts, the recommended voltage is 500 volts. Recommended anode resistor: 10 megaohms. Gas filling. Neon and halogen. Measures .36" (9.1 mm) wide, 1.6" (40 mm) long.

Detects alpha radiation through the thin mica front window.

Click here for detailed electrical and mechanical characteristics.


  • Alpha above 3.0 MeV
  • Beta above 50 KeV
  • Gamma above 7 KeV

The geiger tube comes with a black boot to protect the thin mica end window. This boot needs to be removed to detect alpha particles. However, gamma and beta particles will pass through the boot and be detected.

The United States has declared that this product for restricted exporting to foreign countries. It may still be possible, but will require additional information prior to shipping.

GMT-01 - $74.95
Geiger-Muller Tube

Analog Radiation Meter

Analog Digital Radiation Meter ADM

The Analog Digital radiation meter counts the pulse output of a standard analog Geiger counter. It provides a visual readout of the CPS, approximate radiation level (imperial/metric) and analog radiation field strength meter.

  • 8-12VDC or 5VDC power supply input
  • Counts TTL pulses from Analog Geiger Counter
  • Outputs Digital Counts Per Second (CPS) value
  • Outputs radiation level (imperial / metric)
  • LCD Backlight
  • Available as a kit or assembled

The Analog Digital meter alternates the first line of its display between Counts Per Second (CPS) and then approximate radiation level in either imperial measurements (mR/hr) or metric measurements (mSv/hr). The top line of the display alternates its display every second. The 2nd LCD line is a analog radiation field strength meter that provides a quick visual indication of the current CPS reading.

To fit nicely on the 8 character display line the imperial measurement of mR/hr is abbreviated to mR. Likewise the meteric measurement of mSv/hr is abbreviated to mS.

The second line of the 8x2 LCD is a dedicated analog power meter to read a reasonable approximation of CPS from 1 CPS to 2040 CPS.

Click here to see mounting outline measurements.

Click here to see schematic.

ADM-01A - $64.55 Assembled and tested 

ADM-01K - $45.55 Kit requires assembly

Faceplate For Analog Meter

meter faceplate This faceplate mounts the ADM meter above into the round panel opening of a CDV715 meter. Material is approximately 1/8" thick black plastic.


FB-01 - $6.00


Crooke's Spinthariscope allows users to observe Alpha radiation. By placing an Alpha radiation source near the rear screen of the device users can view alpha radiation through the front window as little flashes of light from the silver activated zinc oxide.

Scintillation Detector Article

ZN-01 - $9.99


Lead Sheet 12" x 12" x 20 Ga. thick.

Lead Sheet 1' x 1' x 20 Ga. thk.

Soft lead sheet is easily cut with a standard scissors. Material is soft enough to form and bend around sharp corners. Typically used for lining boxes for storing radioactive materials. 20 Ga. material is 0.0375" thick. Each 12" x 12" sheet weights approximately 2.5lbs.

Lead Shielding Guide

PB-01 - $22.95 
Lead Sheet 12" x 12" x 20 Ga. 

PB-01S - $22.95 / foot
Lead Sheeting

Enter Length in feet:

USB TTL Serial Cable

Digital Multimeter USB TTL Serial Cable allow easy interfacing to devices over USB.

The USB TTL Serial cable provide connectivity between USB and serial UART
interfaces at 5V.

More Information

USB-3.5mm - $24.95
USB TTL Serial Cable

USB-3.5mm - $24.95
USB TTL Serial Cable

Geiger Counter Apps : Geiger Bot & iGeiger

Geiger Bot is a companion app for Geiger counters, providing you with a toolkit for recording, analyzing, and sharing Geiger counter data.
Geiger Counter Apps GeigerBot and iGeiger
Whether you need a numeric display for an old analog counter, graphing and extensive logging for even a digital counter, or online automated data sharing via Pachube, Geiger Bot can be of use.

Geiger Bot just works. As soon as you start up the app, Geiger Bot will get to work without any configuration necessary. This is done using adaptive signal processing and your device's microphone input. Geiger Bot also supports a direct line-in connection via the headset jack.

Geigerbot is a free iPhone app. For more info, or to download click here.

iGeiger is a ratemeter program. It uses the microphone to detect the clicks from your geiger counter (or other device) and display the Counts Per Minute (CPM).

The measurement period can be set between 1 and 3600 seconds, and readings can be optionally normalized to one minute (60 seconds). The displayed value is grayed out until an entire measurement period's worth of readings has been accumulated.

The minimum required volume of a click to be detected (threshold) can be set, as well as a delay time between clicks.

iGeiger is an iPhone app. For more info, or to download click here.


Cable-G-APP - $19.95
Adapter Cable to interface Images SI Inc. Geiger Counters with geiger apps

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