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☢️ Ludlum Model 12-4 Neutron Survey Meter with Factory Calibration and Hard Case

A professional neutron survey instrument supplied with current 2026 factory calibration by Ludlum. The exact unit is selected after purchase, inspected, and sent through the factory calibration process before delivery.

This is a build-to-order asset assignment. The photos show the model, configuration, and general condition being offered, but the exact serialized meter and case are assigned after purchase.

📦 What You Will Receive

One Ludlum Model 12-4 neutron survey meter
One compatible hard travel case
Applicable batteries
Current 2026 Ludlum factory calibration
Factory calibration paperwork identifying the actual delivered instrument

✅ Factory Calibration and Timing

After purchase, the selected Model 12-4 will be inspected and sent to Ludlum for current 2026 factory calibration. When the work is complete, Ludlum will drop ship the instrument to you with the applicable factory paperwork.

Please allow approximately two weeks for the factory calibration process, plus transit time. Actual timing can vary with Ludlum's workload and the destination. Same-day shipping to the buyer does not apply to this listing.

📷 Condition and Representative Photos

This is used professional radiation-detection equipment. The selected unit may show normal cosmetic wear, including scratches or scuffs, but it will be supplied clean, fully functional, and ready to use. Serial numbers, labels, and case details may vary from the representative photos.

If timing permits, photos of the exact assigned system can be provided after purchase and before final shipment. Multiple units or alternate configurations may also be available by request.

Important Notes

This instrument is intended for neutron radiation surveys.
No radioactive source or radioactive material is included.
The system is guaranteed to arrive fully functional. Damage from abuse, improper handling, unauthorized modification, or incorrect use is not covered.
Buyers outside the contiguous 48 United States should contact us before purchase so shipping arrangements and costs can be confirmed.
Signature confirmation may be required based on order value and carrier requirements.

📩 Questions Are Welcome

If you need several instruments, matched units, or a particular neutron-survey configuration, contact us before purchase and we will confirm availability and timing.