CESTSEN Upgrades the MR-50EXP Handheld Radiation Detector with Real-Time PC Software
CESTSEN, a Shenzhen-based sensor technology manufacturer, has released the latest version of its MR-50EXP handheld radiation detector — a compact, field-ready instrument that combines Geiger tube accuracy with a new upper-computer software package and USB interface. It succeeds the company's EST series gas detector platform and was engineered for professionals who need a dependable handheld radiation detector in the field, in the warehouse, or on the production line.
"Radiation safety is no longer an industrial-only concern," the CESTSEN engineering team explains. "Customs inspectors, medical physics staff, scrap metal traders, building material importers and even jewellery dealers all need a handheld radiation detector they can trust at a moment's notice. The MR-50EXP was designed to be that instrument — light enough to carry all day, accurate enough to defend in a compliance audit."
Four-Ray Detection in One Compact Housing
Unlike single-purpose Geiger counters, the MR-50EXP simultaneously measures alpha, beta, gamma and X-ray radiation. Users can read results in µSv/h, mR/h, CPS, CPM, accumulated total, Bq/cm² and Bq/L — seven measurement modes in one device, switchable on a 60 mm × 42 mm high-definition LCD that displays both numeric values and graphical bar charts.
The instrument is built around a genuine LND7317 Geiger-Mueller tube (45 mm / 1.75" diameter) and applies advanced energy compensation technology, so readings stay consistent across different radiation energies. The measurable energy range spans 20 KeV to 3 MeV, with a determination accuracy of ±10%. Detection covers 0.001–100 mR/h, 0.01–1000 µSv/h, 0–300,000 CPM and 0–5,000 CPS.
Real-Time Data on Your Computer
The defining upgrade of the EXP version is its USB output port and dedicated host software. Instead of transcribing readings by hand, users connect the handheld radiation detector to a laptop and stream measurement values in real time for display, curve analysis and long-term recording — ideal for radiation safety reporting, environmental monitoring projects and university research.
- Simultaneous measurement of α, β, γ and X-rays on one screen
- User-adjustable dose-equivalent-rate alarm threshold (factory default 1 µSv/h) with audible and visual alarm
- Real-time maximum-hold display and bar chart trend view
- Sievert / Rem display conversion at the touch of a button
- Online charging and long runtime — a single 9V alkaline battery delivers up to 480 hours of continuous operation
Where the MR-50EXP Is Deployed
Field feedback has shaped a broad application profile for this handheld nuclear radiation detector:
- Locating local radiation leakage and nuclear radiation contamination
- Environmental radiation inspection at warehouses, ports, customs facilities, hospitals, nuclear power plants and public events
- Radioactivity screening of stone slabs and other building materials
- Safety checks at landfill sites and scrap steel yards
- X-ray intensity detection for medical equipment and surface contamination monitoring
- Inspection of personal valuables and jewellery for harmful radiation
- Radioactivity testing of porcelain tableware and glassware
- Radiation source detection and home decoration material screening
Technical Specifications
| Parameter |
Specification |
| Model |
MR-50EXP |
| Brand |
CESTSEN |
| Measuring rays |
α, β, γ and X-ray |
| Sensor |
Geiger technical tube, 45 mm (1.75") diameter, LND7317 |
| Measuring range |
0.001–100 mR/h; 0.01–1000 µSv/h; 0–300,000 CPM; 0–5,000 CPS; 0–9,999X Total; Bq/cm²; Bq/L |
| Energy range |
20 KeV ~ 3 MeV |
| Accuracy |
±10% |
| Display |
60 mm × 42 mm large-screen LCD with bar chart and symbol display |
| Alarm |
Sound and light alarm, threshold user-settable (factory default 1 µSv/h) |
| Data output |
USB computer connection port with real-time host software |
| Dimensions |
281 × 80 × 35 mm |
| Weight |
Approx. 360 g |
| Sensor operating temperature |
-50 °C to 80 °C |
| Power supply |
9V alkaline dry battery, up to 480 hours continuous operation |
| Certification |
CE, CMA, Radiation Safety License, ISO 9001 |
Certification, Packaging and Supply
The MR-50EXP ships with CE marking, CMA certification, a Radiation Safety License and ISO 9001 quality management certification — documentation that supports customs clearance and tender submission in most export markets. Each instrument is packed in an aluminium protective case, with outer transport packaging in cartons for consolidated shipments.
CESTSEN supports sampling orders from a minimum of one piece, works on T/T payment terms, holds a supply ability of 500 pieces per month and delivers within 5–15 working days. Distributors and system integrators requiring OEM labelling, custom alarm thresholds or bundled software licences are invited to discuss volume programmes with the sales team.
About CESTSEN
CESTSEN is a sensor technology company based in Shenzhen, China, specialising in gas detection and radiation monitoring instruments for industrial, environmental and public-safety applications. Its EST series gas detectors and MR series handheld radiation detectors are sold across Asia, Europe, the Middle East and the Americas.
For pricing, datasheets or a live demonstration of the MR-50EXP handheld radiation detector, contact the CESTSEN export team.
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