Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA

  • Gamma radiation detector and dosimeter in one unit.
  • Continuous reading in Rem/hour (µR/h & mR/h) or in Sievert/hour (µSv/h) and counters per second (cps).
  • Large 30,000-point datalog capacity
  • Visible, audible, and vibration alarms

The GammaRAE II R is two instruments in one: it has the rapid response of a detector and the accurate dose measurement of a dosimeter. It is designed specifically to meet the needs of first responders.

This instrument contains two separate sensors. The Cesium Iodide (CsI) scintillator provides a fast, two-second response to radiological threats, while the energy-compensated PIN diode provides high dose rate range coverage and accurate dose measurements.

GammaRAE II R alerts the wearer with a loud audible alarm, big, bright flashing LEDs, and a built-in vibration alarm. For stealth operations, users can disable each alarm individually.

Immersible (IP67) design makes for reliable operation in wet environments and easy decontamination. IS certification permits operation in potentially flammable/explosive environments.

The GammaRAE II R accumulates accurate total dose. Stored dose data can be cumulative or reset for each use period.

Radiation Sensors

3cc CsI (TI) with Photodiode (Low channel) EnergyCompensated PIN Diode (High channel)

Energy Range

0.06 to 3.0 MeV

Dose Equivalent Rate (DER) for 137Cs

1 μR/h to 600 R/h (0.01 μSv/h to 6 Sv/h)

Accuracy of DER


Dosage Range

1 μR to 999.9 R (0.01 μSvto 9.9 Sv)

Background Reference

Background level reference automatic on start-up, plus user-initiated as needed (Search Mode only)


None required. Periodic functional test recommended using 1 μCi and 16 μCi 137Cs check sources.Factorycalibration available if needed

Time to Alarm

< 2 seconds


  • Loud audible buzzer (85+ dB @ 30 cm)
  • Built-in vibration alarm
  • Highly visible LED lights on both sides of LCD graphic display

Alarm Settings

    Dose Rate
  • Search Mode: Alarm threshold based on variations in local background level
  • Safety Mode: User-programmable low and high alarm thresholds based on dose rate
  • User-programmable low and high alarm thresholds based on dose
  • Stay Time: Alarms vary by time (3 min to 2 hrs, once per minute; <3 min, once every 5 sec; 0 min and beyond, same as dose alarm)

Datalog Size

30,000 data points (20 days at 60-second intervals)

Datalog Modes

  • Continuous:Logs data at all times
  • Event-Driven: Starts logging data on alarm

Datalog Interval

User programmable, 1 to 3,600 seconds


Built-in Bluetooth® radio interfaces with computer for datalog download and configuration changes


2 AA alkaline batteries

Battery Runtime

Up to 600 hours

Operating Temperature

-4° F to 122° F (-20° C to 50° C)

Temperature Alarm

Temperatures above 122° F (50° C) cause a high-temperature alert message


0% to 95% (non-condensing)

Shock Resistance

Passes drop test from 59" (1.5 m)

IP Rating

IP-67 (immersible)

Intrinsic Safety

Certified to meet Class I, Div. I, Groups A, B, C, D, T4 ATEX II IG EEx ia IIC T4


Graphic LCD with 1.2” x 0.75” (30.5 mm x 19 mm) viewable area can be flipped for view by user; Radiation intensity displayed in cps or dosage rate in divisions of R/h or Sv/h

Direct Readout

Dose rate, peak, min, total dose, battery status, time, temperature


Nonslip rubber housing with grippable ridges securely fits hand or glove


2 operation/program buttons


4.92" x 2.68" x 1.38" (125 mm x 68 mm x 35 mm)


9.5 oz (270 g)


Rugged metal belt clip and wrist strap