Active Speed Sensors - Variable Reluctance and RF Models

Active, or amplified sensors with digital output offer a low cost solution for interfacing directly to data acquisition systems. These sensors integrate a preamplifier/signal conditioner within the sensor housing and offer the advantages of excellent noise immunity and greater transmission capability.

Input power supply requirements cover the most popular ranges for both commercial and industrial use. The output frequency of these sensors has a square pulse waveform (digital) that directly relates to the number of turbine blades, gear teeth, etc. that have been sensed. These pulses, in turn, can be correlated to determine flow rate, RPM, or velocity.

Magnetic (inductive or variable reluctance)or RF (modulated carrier)

WarrantyUnconditional one (1) year warranty if used within specifications.

Physical Features

  • Body material: 300 series stainless steel
  • Encapsulation: epoxy potting or hermetically sealed, welded construction
  • High Shock and Vibration resistance – MIL-STD-202G METHOD 214A, Test Condition H

Input Power

  • 8 to 30 VDC, 10 mA max. @ no load
  • Reverse polarity protected

Pulse Output Options

  • Open collector; maximum OFF current 30 VDC, maximum ON current 400mA
  • TTL/CMOS: fan-out of 5 TTL/CMOS loads
  • 0-10 VDC square wave (requires 15-30 VDC input power)

Interconnection Option

  • Three (3) pin MIL-C-5015 type connector with gold plated pins; mates with MS3106-10SL-3S; other connector types upon request.
  • Pigtail with wires or cables.
  • NPT threaded body with wire or cable pigtail for explosion proof environments.

Temperature Range

-40˚C to +85˚C
-65˚C to +125˚C

NOTE: Units that operate up to +125°C are also available

Pin Connections
  • Pin A (Red): Input Power (+)
  • Pin B (White): Pulse Output (+)
  • Pin C (Black): Common (-)

Up to 0.140″ dependent on target geometry and sensor construction.

CE compliant to EMC Directive 2004/108/EC for use in residential, commercial, light industrial and heavy industrial environments.

Variable Reluctance Active Speed Sensors

Model NumberMounting Thread (A)Thread Length (B)Overall Length (C)Tip
Pulse Range)
DM-0105/8×18.8753.6.031/.100open collector
DM-0025/8×18.8753.6.031/.1000-5 VDC
DM-0115/8×18.8753.6.031/.1000-10 VDC
DM-01311/16×24.8753.6.075/.105open collector
DM-00111/16×24.8753.6.075/.1050-5 VDC
DM-01211/16×24.8753.6.075/.1050-10 VDC