Intrinsically Safe RF Speed Sensors

Intrinsic safety has become an increasingly popular approach for handling sensing requirements in hazardous locations. These sensors are intrinsically safe versions of Motion Sensors Hermetically Sealed VR Sensors or Epoxy Encapsulated VR Sensors.

Variable reluctance (VR) or inductive type

Unconditional one (1) year warranty if used within specifications

Physical Features

  • Body material: 300 series stainless steel (locknut included)
  • Encapsulation: hermetically sealed, heli-arc welded construction or epoxy encapsulation
  • Magnet that resists demagnetization
  • Focusing tip (pole piece) which allows greater air gap with no signal loss
  • IR leakage: 100 Mohms @ 100 VDC min.
  • High signal output
  • High Shock and Vibration resistance (MIL-STD-202G METHOD 214A, Test Condition H)

Entity Parameters

  • Group IIC:
    – Vmax/Ui = 30 VDC
    – Imax/Ii = 300 mA
    – Pi = 0.75 W
    – Ci/Ci = 0 uF
    – Li/Li = 0 mH


Ambient Temperature

-50°C to 175°C

RF Standard 5/8×18 Thread

RF Standard 11/16×24 Thread

Hazardous Location: Class I, Div. I, Group A,B,C,D; Class II, Div. I, Group E,F,G; Class III and coal dust (If equipped with NPT/pigtail lead combinations, below units are also suitable for Class I, Div. I, Group A,B,C,D; Class II, Div. I, Group E,F,G; and Class III)

RF45-55/8×˚C to +175˚CMIL-C-5015 Connector
RF10-65/8×181.11.62510.51.0-50˚C to +175˚CMIL-C-5015 Connector
RF10-75/8×181.12.2710.51.0-50˚C to +175˚CNPT/12″ #22 AWG Teflon
RF10-111/16×24.582.2410.51.0-50˚C to +175˚CMIL-C-5015 Connector
RF10-311/16×24.581.6610.51.0-50˚C to +175˚C12″ #22 AWG Teflon
RF10-411/16×240.631.8810.51.0-50˚C to +175˚CNPT/12″ #22 AWG Teflon

Dimensions in inches
Specifications +/-10%
Mounting threads UNF-2A

instrinsically safe speed sensor