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Low Power Continuous Radon Monitor


Dynamic Range 1-200 pCi/l
Units pCi/l or Bq/m³
Sensitivity 0.350 CPM per pCi/l
Linearity 1-200 pCi/l (<10%)< /td>
Temperature Range 50-104 ºF
Barometric Pressure Range 0-38 inHg
Relative Humidity Range 0-90%
Sampling Mode Passive Air Diffusion
Power Batteries / 1-year
Data Storage 192 Hours (8 Days)
External Output Serial RS-232C

AARST-NRPP Approved: CR-8444

The femto-TECH, INC. model CRM-510LP is a precision airborne alpha radiation detection instrument based on the same field proven pulsed ion chamber technology of previous models R210F and RS410F. Due to a unique patented electrometer and open grid probe design, the model CRM-510LP is highly suited for a wide range of radon measurement applications. Because of the low current requirements of the electrometer detector and on-board computer, the model CRM-510LP is truly a portable self-contained continuous radon monitor that can read and store test data for eight days of stand-alone operation. In this "passive" mode of operation the model CRM-510LP is uniquely suited for screening and follow-up type testing.

The full function computer system incorporated in the model CRM-510LP provides the operator with a highly flexible radon detection instrument and data logger operating system, while still maintaining the simplicity of operation for which femto-TECH instruments are noted. In addition to the measurement and storage of radon data, the highly sophisticated on-chip peripheral capabilities of the micro controller (MCU) used in the CRM-510LP provide for the measurement and storage of temperature, barometric pressure, and relative humidity. This multidimensional data acquisition capability provides the tester with a unique data base for evaluating the validity of short term radon measurements.

Software & Results

Paired with our provided software or thermal printer, the user can conduct a protocol test and then generate the data directly to our partnered third-party laboratory, Air Chek. Our Blind Edition software is available for both Windows & Android operating systems. Click HERE or HERE to learn more about the software.


femto-TECH devices have been designed to meet the requirements of Professionals who need reliable measurements, but also need additional information to assist them in interpreting results.

Anti-Tamper Motion Detector


With the integrated tilt sensor, you can tell if any movement or tampering has been detected on the hour of it's detection.

Real-Time Radon Measurements

Observe the radon average/rate on the LCD screen while the test is being performed!

Fully responsive

Cutting Edge Sensitivity

The CRM-510LP outperfoms every solid-state device on the market. It's like comparing a microscope to a magnifying glass.

Keyed Security Lock

A physical key is required to run/manage the CRM-510LP, meaning the test cannot be stopped or tampered with while you are away.

Units of Measurement

Your choice!

Select between US & EU standards of measurement for radon, temperature, and barometric pressure.

Thermal Printer Support

Both wired and bluetooth

Directly connect to select Seiko printers, or use our mobile app to print via bluetooth to Star Micronics or Epson thermal printers.

Modern Report Generation


Use your preferred device platform to generate cohesive reports once your test is complete - at no added cost to you!

Add images to your report

Take a picture and add it to your report using our app, or simply add your choice of preexisting saved images.

Add signatures to your report

Use the mobile app to add a company & customer signature to your report.

CRM-510LP Device Training

This free online course includes everything regarding the usage of this CRM device.

Downloadable certificate proving completion of the course is issued upon passing a 20 question test with 75% or more.

Related items


Blind Edition of the CRM-510LP


CRM-510LP with added CO sensor

613 Case

Case for the CRM-510 model line

Government Affiliates

Industry Affiliates


Contact Us

25 Eagle Court,
Carlisle, OH 45005

Phone: (+937) 746-4427
Fax: (+937) 746-9134

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Friday | 8am - 3pm