Replacement Probes
Replacement Probes
We offer a variety replacement probes for our Radiation Alert® instruments.
SE International can help you find just the right probe for your application. Below are the specifications for the most common detectors that we offer.
Ranger EXP Probe
Detector
External Halogen-quenched, uncompensated Geiger Muller tube with a thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.75 in.). Radiation symbol on probe head label marks the center of the detector
Which Detector Works With My Model of EXP?
All Ranger EXP Models are RAP-RS2 Probes with BNC.
For Previous Model SEI’s Radiation Alert Inspector EXPs:
The RAP-RS1 fits the EXP Models (SN#s 27299 and lower) No longer available.
The RAP-RS2 fits the EXP Models (SN#s 27300 and higher)
Probe Construction
Anodized aluminum housing
Size
RAP-RS1 Approx. 8.75 X 1 in. (222 X 25 mm) Dia.: 2.75 in. (70 mm)
RAP-RS2 Approx. 10.7 X 1 in. (272 X 25 mm) Dia : 2.75 in. (70 mm)
Connector
RAP-RS1: Amphenol-Tucal
RAP-RS2: BNC
Handle
Black foam grip
Weight
RAP-RS1: Approx. 11.5 oz. (328 g) w/o cable
RAP-RS2: Approx. 9.6 oz. (272 g) w/o cable
1x1 Nal Scintillation
(Typically 1.0″ dia x 1.0″ thick (25.4 x 25.4mm)
Indicated Use: Low-level, wide-energy gamma detection
Detector Type: NaI(Tl) scintillator, 2.5 cm (1 in) dia. x 2.5 cm (1 in) thick
Efficiency (4π): 125I 7%
Efficiency (4π): 57Co 10%
Efficiency (4π): 137Cs 3%
Efficiency (4π): 60Co 3%
Energy Range: 20 keV to 1.5 MeV
Sensitivity: >18,000 CPM/mR/hr (137 Cs)
Photomultiplier Tube: 2.86 cm (1.123 in) diameter, magnetically shielded
Operating Voltage: 500 to 1200 V
Temperature Range: -15 to 50 °C (5 to 122 °F) / May be certified for -40 to 65 °C (-40 to 150 °F)
Connector: Series “C”
Construction: Aluminum with beige powder coat
Size (D x L): 5.1 x 18.5 cm (2 x 7.3 in)
Weight: 0.5 kg (1 lb)
2x2 Nal Scintillation
(Typically 2.0″ dia x 2.0″ thick (50.8 x 50.8mm)
Indicated Use: Low-level, wide-energy gamma detection
Detector Type: NaI(Tl) scintillator, 2.5 cm (1 in) dia. x 2.5 cm (1 in) thick
Efficiency (4π): 125I 4%
Efficiency (4π): 57Co 20%
Efficiency (4π): 137Cs 9%
Efficiency (4π): 60Co 15%
Energy Range: 30 keV to 3.0 MeV
Sensitivity: >90,000 CPM/mR/hr (137 Cs)
Photomultiplier Tube: 2.86 cm (1.123 in) diameter, magnetically shielded
Operating Voltage: 500 to 1200 V
Temperature Range: -15 to 50 °C (5 to 122 °F) / May be certified for -40 to 65 °C (-40 to 150 °F)
Connector: Series “C”
Construction: Aluminum with beige powder coat
Size (D x L): 6.6 x 27.9 cm (2.6 x 11 in.)
Weight: 1.04 kg (2.3 lb)
Additional information
| Type | Ranger EXP Probe, 1×1 Nal Scintillation, 2×2 Nal Scintillation |
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