Ranger by SE International - Handheld Geiger Counter
Ranger by SE International - Handheld Geiger Counter
The SE International Radiation Alert Ranger is a handheld digital Geiger counter for detecting alpha, beta, gamma, and X-ray radiation. It features a digital readout with a red light indicator, silenceable audible beeper, adjustable alert threshold, and built-in timer. Observer USB Software enables data logging, computer alarms, and calibration. Operating range covers 0.001–100 mR/hr, 0–350,000 CPM, 0.01–1000 µSv/hr, and 0–5,000 CPS, with ±10% accuracy referenced to Cs-137 (NIST calibrated). Common applications include surface contamination screening, environmental monitoring, noble gas detection, and radionuclide exposure monitoring.
Choose Your Option
Rent for flexible short-term use or purchase to own
Rental Rates
Daily
$60.00
Weekly
$175.00
Monthly
Contact for pricing
Reference rates only. You get the best rate calculation - actual price based on your selected rental dates.
What is the SE International Radiation Alert Ranger used for?
It's a handheld Geiger-Müller survey meter for detecting and measuring alpha, beta, gamma, and X-ray radiation. Common uses include health physics surveys, contamination checks, radiation work area monitoring, and field verification of radiological boundaries.
What radiation types does the Ranger detect?
Alpha, beta, gamma, and X-ray radiation using its built-in GM pancake detector. Alpha detection requires close proximity to the source since alpha particles have limited range in air.
Ranger vs. Ranger EXP: what's the difference?
Both use the same meter, the same 2-inch pancake GM tube and the same ranges and accuracy. The EXP puts the tube in an external probe on a 3 ft cable, so you can reach into tight spaces or scan a surface without moving the meter. The standard Ranger has the tube built into the back. Rental rates are the same.
Geiger counter vs. scintillation detector — when should I use each?
Use a Geiger counter for contamination surveys, surface beta/gamma checks, and portable field monitoring where robustness and portability matter. Use a scintillation detector when you need higher sensitivity to low-level gamma at ambient dose rates or require energy discrimination.
What should I confirm before deploying for a survey?
The radiation type and energy range expected, whether surface contamination or area dose rate monitoring is the objective, and that the instrument's measurement range is appropriate for expected activity levels at your site.
What does it cost to rent the Radiation Alert Ranger?
$60 for 1 day, $120 for 2 days, $175 for 3–5 days. Rentals longer than 14 days are available by quote.
Can I rent it for a month or longer?
Yes. Rentals longer than 14 days are by quote and billed monthly. We send a unit whose calibration stays valid past your return date, and if a unit comes due mid-rental we swap it before you have to send it back.
Can you download the data for me?
Yes. The meter logs readings you can download with the Observer USB software on the flash drive we include. If your company doesn't allow flash drives or third-party software, add a data download to your rental and we'll pull the data and email it to you.
Is this a dosimeter?
No. It's a handheld survey meter that shows the radiation level where you hold it. It isn't worn and doesn't track a person's accumulated dose. For a person's dose over time, use a personal dosimeter.
Exposure Hazards This Equipment Detects
Gamma Rays (γ)
CAS:
N/A
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A
Alpha Particles (α)
CAS:
N/A
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A
Beta Particles (β)
CAS:
N/A
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A
Features & Capabilities
| Calibration Certificate Available: | ✓ Yes |
| Datalogging: | ✓ Yes |
| Monitoring Scope: | Area Monitoring |
Equipment Specifications
| Detection Method / Sensor Type: | Internal 2-inch pancake Geiger-Müller tube (halogen-quenched, uncompensated) with a thin mica window on the back of the meter: 1.4–2.0 mg/cm² areal density, 45 mm (1.77 in.) effective diameter |
| Target Parameter / Analyte: | Alpha, beta, gamma and X-ray radiation |
| Grade Library: | Built-in isotope efficiencies for sulfur-35, strontium-90/yttrium-90, cesium-137, phosphorus-32, carbon-14, iodine-131, cobalt-60 and alpha |
| Measurement Range: | 0.001 mR/hr (1 µR/hr) to 100 mR/hr; 0 to 350,000 CPM; 0.01 to 1,000 µSv/hr; 0 to 5,000 CPS |
| Response Time: | Display updates every second. Auto-averaging uses the last 30 seconds below 6,000 CPM, 6 seconds from 6,000 to 12,000 CPM and 3 seconds above 12,000 CPM; a fast-response mode can be selected |
| Accuracy: | ±15% typical from the factory; ±10% with NIST source calibration (referenced to Cs-137). RAECO Rents units ship NIST calibrated. Dose-rate readings (mR/hr, µSv/hr) use a Cs-137 conversion and are less accurate for other isotopes |
| Alarm Setpoints: | Adjustable alert from 0.001 to 100 mR/hr and 1 to 350,000 CPM (also µSv/hr and CPS) |
| Alarm Features: | Audible alarm 70 dB at 1 m with flashing radiation icon; red LED flashes with each count; per-count clicks can be muted without muting the alarm |
| Calibration Standard: | Referenced to Cesium-137 (Cs-137); NIST source calibration |
| Recalibration Interval: | Annual; calibration certificate included |
| Connectivity: | Mini-USB to a PC with Observer USB software for data download, computer alarms and calibration. Software is included free with the rental on a flash drive |
| Display: | Backlit graphic LCD |
| Parameters Displayed: | mR/hr, µR/hr, µSv/hr, CPM, CPS and timed total counts (1 to 9,999,000); activity in DPM and Bq using built-in isotope efficiencies |
| Altitude Limit: | The mica tube window can rupture above 8,000 ft (2,438 m) |
| Data Logging Interval: | Default 10 minutes; adjustable in Observer USB software |
| Battery Run Time: | 2 AA alkaline batteries; approx. 800 hours at background |
| Size / Weight: | 140 × 68 × 33 mm (5.5 × 2.7 × 1.3 in.); 10.3 oz (0.64 lb) |
| Intended Use: | Surface contamination surveys, general surveys to locate a source (such as in scrap), monitoring while working with radionuclides, environmental screening and noble gas detection |
| Variants Available: | The Ranger EXP is the same meter with the same pancake GM tube, ranges and accuracy, but the tube sits in an external probe on a 3 ft cable. Choose the standard Ranger for a single-piece handheld; choose the EXP to reach into tight spaces or scan surfaces without moving the whole meter |
Kit Contents
Manufacturer Resources
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Rental Dates Notice