Images Scientific Instruments Inc.

Add a digital display to your analog Geiger counter!

The DMAD Digital Meter Adapter

Three Digital Functions: CPS/CPM, Radiation Level, Random Number Generator

The DMAD Expansion Module for Analog Geiger Counters

Digital Meter AdapterThe Digital Meter Adapter is a expansion module for adding digital display and functions to compatible Analog Geiger Counters. What's compatible? If your analog Geiger counter outputs a ttl pulse for every radioactive particle it detects, your Geiger counter will connect to Images SI Inc.'s DMAD Digital Meter Adapter.

The DMAD has three functionalities to enhance the capabilities of Analog Geiger Counters. It counts pulses from analog Geiger counter and convert reading into a precise Counts Per Second (CPS) or Counts per Minute (CPM). Then it converts the CPS or CPM reading in an equivalent radiation level. Both count data and radiation level are displayed on the LCD display. The DMAD also has a serial output that is compatible with Images USB-TTL cable interface. This allows the DMAD, working with the USB-TTL cable to connect your analog Geiger counter to Images' free radiation monitoring and graphing software.

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)

Random Number Generator Functionality

This DMAD mode outputs a true random number each time a radioactive particle is detected. The Geiger counter is typically set up to detect 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:

Random Number Generator Screen
1-2 (Binary/Heads or Tails)

Depending upon background radiation level, the generator will generate 20-40 random numbers per minute. The DMAD outputs the Random numbers via its TTL serial port which may be interfaced to another device.

Serial Functionality
This Digital Adapter also provides an serial output. When used in combination with Images USB-TTL cable the DMAD outputs data to Images Company Geiger Counter Graphing program. for non-commercial use only*

Radiation Detection Program USB-TTL Cable

LCD Screen Closeup
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.

* Commercial Applications must be licensedAcrylic DMAD stand


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.

USB-3.5mm - 24.95 USB TTL Cable

Acrylic Stand - $10.95

Additional Options:
Acrylic Stand - $10.95

USB-TTL Cable - $24.95

Analog Digital 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.

More Information & Accessories

Analog Digital Radiation Meter
ADM-01A - $64.55 Assembled and tested
ADM-01K - $45.55 Kit requires assembly