RDU-18 Radiation Sensor Specifications

Detector

Halogen-quenched Neon Geiger-Mueller gamma detector
Stainless Steel Window

Sensitivity

18 cps/mR/Hr gamma radiation (from isotopes such as ¹³⁷Cs, ⁶⁰Co, ²³⁸Pu, and other fission products, and fissile materials ²³²Th, ²³⁵U and ²³⁹Pu.)
10 cpm detector background

Alert Threshold

Thresholds are provided for 4 levels:

Alert Level
Threshold

Minimum Detectible Level
Alarm threshold referenced to mean background Geiger event period and 1 ppm probability threshold. Most sensitive to transient exposures for application in portals and traffic choke points.
Aprox. 50 µR/hr

LOW
Aprox. 1 mR/hr

MODERATE
Aprox. 10 mR/hr

HIGH
Aprox. 100 mR/hr, or Saturated Detector

Interface

4-Wire, AWG 20-26 Gauge
Internal Screw Terminal Connections:

Terminal	Connection
1	V+ Input, 9-15 Volts, D.C., 25 mA
2	Serial Data +
3	Serial Data -
4	Ground

NOTE: The RDU-18 can be configured to provide a contact closure for interface to Security/Alarm systems, or for other applications involving robotic or automated systems. Please contact TRD Associates for further information on this option.

Housing

ABS plastic
4.53 x 2.56 x 1.58 inches
IEC 529 - IP65, NEMA-4X rated, dust/waterproof
Sealed Cable Gland/Strain Relief

Operating Temperature

-20 to +70 C

Protected by US Patent #7,327,270. Other patents pending.
Product in development, specifications may change without notice.