This Digital Meter Adapter plugs into the digital out of the analog geiger counters and display a Count Per Second (CPS) or a Count Per Minute (CPM) and the equivalent radiation level. CPS or CPM mode is user selectable. Radiation level is provided in mR/hr or mSv/hr in CPS mode (user selectable). In CPM mode radiation level is provided in uR/hr or uSv/hr (user selectable). The adapter is compatible with analog meter geiger counters that use either an internal tube or a wand with shielded cable.

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

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

Digital Meter Adapter Construction Article

This Digital Adapter plugs into the digital out of the analog geiger counters and provides an RS-232 computer output for use with Images Company Geiger Counter Graphing program.
Click here to see screen image from program.

The Windows Geiger Counter program is free to download;

Download Digital Geiger Counter charting software for Windows XP (3 MB).
Download Digital Geiger Counter charting software for Windows 98 (3 MB).
Software Manual(PDF file 1.9 meg)
On Line Interactive Software Tutorials

The adapter is compatible with analog meter geiger counters that use either an internal tube or a wand with shielded cable.

May be Purchased as a kit or assembled and tested

This adapter plugs into the digital out of the analog geiger counters and provides a random each time a radioactive particle is detected. The geiger counter is set up to read background radiation. The random numbers generated are truly random since they are based naturally occurring radioactivity.

The random number generate may be set to the following ranges:

Binary (1-2) Heads or Tails
Decimal (1-10)
1 Byte (1 - 255)
2 Byte ( 1 -65535)

The random number generator is compatible with analog meter geiger counters that use either an internal tube or a wand with shielded cable.

Typically, depending upon location, the generator will generate 20-40 random numbers per minute. TTL Serial Output Random numbers are sent out via a TTL serial port that may be interfaced to a micro controller or PC.

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

The Geiger Counter wand has a thin mica window 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:

GM tube specifications

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.

The Screen shield is an open mesh nylon screen that allows all radiation including alpha to pass through. 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.

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.

Click here for detailed electrical and mechanical characteristics.

The Radiation Meter may be incorporated into a standard analog geiger counter to provide a visual readout of the approximate radiation level.

Click here to see schematic.

Complete unit plugs into the headphone jack using a 3.5mm plug. Compatible with the GCK-01 and GCK-02 geiger counters.

Analog Radiation Meter is available alone, as kit, or assembled and tested.

These sources are used for viewing radioactive particle trails in a cloud chamber.

Click here to see schematic.

The S-11 contains one alpha (< 0.1 µCi, Po-210) and one beta (< 0.1 µCi, Sr-90) needle source mounted in stoppers. The activity is deposited on the ends of the needles. Rubber stoppers fit into the ends of plastic test tubes for safe, convenient storage.

Pb-210 Needle Cloud Chamber Source Contains Pb-210 < 0.01 µCi

Sample radioactive sources for testing the functionality of a geiger counter. Safe, uncalibrated solid sealed sources are fabricated by depositing a license exempt quantity of activity in the well of a 1-inch diameter (25mm) by 1/8-inch thick (3mm) plastic disk. After drying, the well is filled with an epoxy material; sealing the radioactivity inside the source. Contains ±20% of the stated activity and are routinely compared to calibrated reference standards. Each disk is identified by radio nuclide, amount of activity, serial number and calibration date. The words "Caution - Radioactive Material" appear on the label of each source.

These radioactive sources are dropped shipped from separate location.

Pb-210 Needle Cloud Chamber Source Contains Pb-210 < 0.01 µCi

For More Radioactive Sources Click Here

Radioactive uranium ore sample.

Useful for testing Geiger Counters.
License exempt.
Uranium ore sample sizes vary.
Shipped in labeled metal container as shown.

Each radioactive ore sample is measured with A GCA-04W Digital Geiger Counter. Activity of alpha, beta and gamma in Counts Per Minute (CPM) is provided along with measurement certification. Ore samples typically have one area that is more radioactive than other areas. Measurement of radioactivity is taken from the most radioactive portion of the sample.

Shipping Information:

We are always in compliance with Section 13 from part 40 of the NRC Nuclear Regulatory Commission rules and regulations and Postal Service regulations specified in 49 CFR 173.421 for activity limits of low level radioactive materials. Item will be shipped in accordance with Postal Service activity limits specified in Publication 52.

Radioactive minerals are for educational and scientific use only.

For More Radioactive Sources Click Here

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

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.

USB Adapter for Digital Geiger Counters and RS-232 Adapter.

Description
The USB PDA/Serial Adapter (GUC232A) provides you with an external serial (DB- 9 male) Plug-n-Play connection for use with computers, notebooks, and hand held computing devices that support USB. The PDA/USB Serial Adapter has a standard type A USB plug.

This USB PDA/Serial Adapter provides The GCA-04, GCA-04W and RS-232 Adapters with high quality serial connection. This makes the USB interface transparent to serial peripherals, allowing them to easily interface with USB computers. This eliminates the setup hassle found with traditional serial port connections. This device also supports energy saving suspend and resume operations.

Features
* Full Compliance with USB specification v1.1
* Work with serial devices, converts the serial interface to USB.
* Supports the RS 232 Serial interface
* Supports automatic handshake mode
* Easy Installation

Requirements

* For PC Users
* 300 Mhz CPU
* Windows® 98SE, 2000, ME, XP
* Available USB port