NIST 2025 Calibrated! Ludlum Model 14C + 44-7 Probe Guaranteed for 1 year!

Multiple calibrated meter and probe combinations are available for purchase or rental. Contact us if you need a specific configuration or pairing.

This listing is for a Ludlum Model 14C portable survey meter paired with a Ludlum 44-7 GM pancake-style detector. The unit has been fully serviced and calibrated using a Ludlum Model 500 digital pulse generator with a current NIST traceable factory calibration. The calibration performed in December 2025 is documented in the included paperwork. Needle alignment, response, and stability were verified following Ludlum procedures.

Certified 2025 Calibration
Ludlum Model 14C Survey Meter with Ludlum 44-7 GM Detector

This instrument is guaranteed to arrive fully functional, tested, and ready to use. Batteries are included.
The exact unit shown in the photographs is the one you will receive.

The meter is used and may show normal cosmetic wear, but it has been carefully inspected, serviced, and adjusted for proper operation. All calibration paperwork and supporting documentation are included exactly as shown.

The 44-7 detector provides excellent sensitivity for general Alpha, Beta, and Gamma contamination surveys.
Portable radiation survey meter often referred to as a Geiger Counter.

The sample photographs show the instrument responding to a check source to demonstrate proper function. The check source is not included.

These are high-quality professional units that have been well maintained and tested to a high standard.

Please review all photos for condition and details. This one does have a small crack on the glass meter cover. See pictures!

You may search the model numbers online for full specifications.

If you have any questions, feel free to contact me. I respond quickly.

Item ships the same day payment clears.

If purchasing from outside the 48 states, please contact me before buying so that shipping arrangements can be made.