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Variable Reluctance Speed Sensors

Variable Reluctance speed sensors can sense a ferrous metal target and are ideal for use in all types of environments and user specifications. Options include hermetically sealed, cryogenic, high temperature, intrinsically safe and explosion proof.

In addition to the more common VR sensors, we also offer an inductive type speed sensor for applications where magnets, rather than ferrous metal, will be sensed.

CUSTOM MODELS

In addition to our standard models, Variable Reluctance speed sensors are available in custom lengths, diameters, configurations, and mounting threads. Custom operating specifications (output options, etc.) are available, as well as options such as pigtail leads or NPT threading. See additional sensor customization options.

sensor customization options
view our principals of
operation
see our certifications
Epoxy Encapsulated Variable Reluctance Speed Sensors

Value series VR speed sensors are epoxy encapsulated models that are most suitable for applications that do not have special environmental requirements (e.g., wide operating temperature range, hermeticity, atmospheric contamination, etc.). Standard models feature metal fronts to better protect the sensor internals from moisture intrusion (versus an epoxy encapsulated front). Connectors are welded to the sensor body, providing assurance that there will not be issues when installing mating connectors.

  • Features & Specifications
  • Standard Models
  • Two (2) standard body styles
  • Variable reluctance (VR) type
  • Epoxy encapsulation
  • Two (2) pin gold plated connector (mates with: MS3106-10SL-4S)
  • 300 stainless steel housing (lock-nut included)
 
  • IR leakage: 100 Mohms @ 100 VDC minimum
  • High Shock and Vibration resistance (MIL-Std-202G METHOD 214A, Test Condition H)
  • Intrinsically Safe certified versions available (ATEX and CSA)
  • Unconditional one (1) year warranty if used within specifications


STANDARD MODELS

Standard Drag VR Models Type 1

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance
(ohms)		Inductance
(mH)		Operating
Temp
(°C)
PC51-6E5/8x181.102.20.031/.1001200500-55 to 120
PC24-164E11/16x241.102.20.075/.1051200500-55 to 120
PC24-165E11/16x241.102.20.075/.10528001200-55 to 120

Standard Drag VR Models Type 2

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance
(ohms)		Inductance
(mH)		Operating
Temp
(°C)
PC51-15E5/8x181.432.656.020/.1061200500 typ.-55 to 120
PC51-16E5/8x181.132.356.020/.1061200500 typ.-55 to 120
PC51-18E5/8x181.132.356.020/.1061200500 typ.-55 to 232
PC55-13E5/8x181.432.656.015/.187120-16285 typ.-55 to 120
PC55-15E5/8x181.132.356.015/.187120-16285 typ.-55 to 120
PC55-18E5/8x181.132.356.015/.187120-16285 typ.-55 to 232

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

Hermetically Sealed VR Speed Sensors

Premium series VR speed sensors are hermetically sealed for resistance to moisture and other atmospheric contamination and can withstand repeated thermocycling in temperatures ranging from -450°F to +450°F, making them ideal for use in aerospace and other applications with broad temperature ranges. They are also excellent for use in cyrogenics for their ability to operate dependably at extremely low temperatures for long periods of time.

  • Features & Specifications
  • Standard Models
  • Variable Reluctance (VR) or inductive type (no internal magnet)
  • Hermetically sealed, heli-arc welded construction
  • Two (2) pin gold plated glass sealed connector (mates with: MS3106-10SL-4S)
  • 300 series stainless steel housing (lock-nut included
  • Magnet that resists demagnetization
  • Unique potting that compensates for temperature extremes
  • Focusing tip (pole piece) which allows greater air gap with no signal loss
 
  • Temperature range:
    -450°F to +450°F (-270°C to +232°C)
  • IR leakage: 100 Mohms @ 100 VDC minimum
  • High Shock and Vibration resistance
    (MIL-Std-202G METHOD 214A, Test Condition H)
  • Intrinsically Safe certified versions available (ATEX and CSA)
  • Unconditional one (1) year warranty if used within specifications
 


Standard Drag VR Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance
(ohms)		Inductance (Henry)Gauss Strength
PC51-1G5/8x181.002.212.031/.1001200.54810
PC13-74G11/16x24.5632.685.070/.12518001.3850
PC13-70G11/16x24.5631.975.070/.12518001.3850
PC13-106G3/4x201.252.685flush front18001.3850

Low Drag Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance
(ohms)		Inductance (Henry)Gauss Strength
PC55-2G5/8x181.002.212.031/.10017001.4325
PC24-45G11/16x24.5632.220.070/.12513801.6350
PC24-141G3/4x201.252.685flush front13801.6350

Inductive Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance
(ohms)		Inductance (Henry)Gauss Strength
PC53-1G5/8x181.002.212flush front500015n/a
PC3-24G11/16x24.5632.220flush front500015-20n/a

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

High Temperature Variable Reluctance Sensors

Variable reluctance speed sensors for extreme high temperature applications. Feature an operating temperature range of -450°F to +850°F and +1000°F intermittently. Standard models are equipped with a flexible stainless steel braided sheath that can withstand exposure to +1000°F. Special materials and construction prevent damage from physical abuse and thermal shock. In addition, all High Temperature magnetic sensors are hermetically sealed.

  • Features & Specifications
  • Standard Models
  • Variable Reluctance (VR) or inductive type (no internal magnet)
  • Hermetically sealed, heli-arc welded construction
  • Three (3) foot stainless steel overbraided lead (custom length available upon request)
  • 300 stainless steel housing (locknut included)
  • Magnet that resists demagnetization
  • Unique potting that compensates for temperature extremes
  • Focusing tip (pole piece) which allows greater air gap with no signal loss
  • Operating temperature range: -450°F to +850°F & +1000°F intermittently
  • IR leakage: 50 Mohms @ 50 VDC minimum
  • High signal output
  • Unconditional six (6) month warranty if used within specifications

Standard Drag High Temp VR Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance (ohms)Inductance (Henry)Gauss Strength
PC28-41G5/8x18.8753.1.031/.100100.091000
PC28-13G11/16x24.5633.1.070/.125120.101050
PC28-45G3/4x201.253.1.070/.125120.101050

Low Drag High Temp VR Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance (ohms)Inductance (Henry)Gauss Strength
PC28-40G5/8x18.8753.1.031/.100160.20180
PC28-14G11/16x24.5633.1.070/.125180.25200
PC28-24G3/4x201.253.1.070/.125180.25200

Inductive High Temp Models

Model NumberMounting Thread
(A)		Thread Length
(B)		Overall Length
(C)		Tip (Length/Dia.)
(D)		Resistance (ohms)Inductance (Henry)Gauss Strength
PC23-24G11/16x24.5633.1flushfront2501.2n/a
Dual Winding VR Sensors

This product family offers Variable Reluctance (VR) speed sensors that integrate dual windings within the sensor housing to provide redundant output capability, and are extremely popular in aerospace and other critical applications. Standard models incorporate stainless steel housings, MIL spec connectors or cabling, and grounding to case to enhance protection against EMI and external noise. This line of sensors also offers a wide temperature range and is suitable for use in cryogenic environments.

  • Features & Specifications
  • Standard Models

Type
Variable reluctance (VR), dual winding

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
  • Sensor body grounded to connector pin/cable shield
  • IR leakage: 100 Mohms @ 100 VDC min.
  • High signal output for both windings
  • High Shock and Vibration resistance (MIL-STD-202G METHOD 214A, Test Condition H)

Interconnection Options

  • MIL-DTL-26482 6 pin connector
  • M22759 6 conductor cable
  • Other connectors and cable/wiring options available upon request

Temperature Capabilities
Temperature options from -270C to +232C

Warranty
Unconditional one (1) year warranty if used within specifications

Model NumberMounting ThreadThread LengthOverall LengthTip (Length/Dia.)Resistance
Coil 1
(ohms)		Resistance
Coil 2
(ohms)		Interconnection
PC41-15G3/8-24.702.15.031x.094210215Connector
PC41-16GM12x1.702.15.031x.094210215Connector
PC41-17E3/8-24.701.67.031x.094210215Cable
PC41-18EM12x1.701.67.031x.094210215Cable
PC51-71G5/8-181.02.15.031x.100565750Connector
PC51-72GM16x1.51.02.15.031x.100565750Connector
PC51-73E5/8-181.01.67.031x.100565750Cable
PC51-74EM16x1.51.01.67.031x.100565750Cable

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

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.

  • Features & Specifications
  • Standard Models
Type
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

Operating:
-40˚C to +85˚C
Storage:
-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 (-)

Airgap
Up to 0.140" dependent on target geometry and sensor construction.

Approvals
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
(Length/Dia.)
(D)		Output
Pulse Range)
DM-0105/8x18.8753.6.031/.100open collector
DM-0025/8x18.8753.6.031/.1000-5 VDC
DM-0115/8x18.8753.6.031/.1000-10 VDC
DM-01311/16x24.8753.6.075/.105open collector
DM-00111/16x24.8753.6.075/.1050-5 VDC
DM-01211/16x24.8753.6.075/.1050-10 VDC
Active VR Speed Sensors - EMI Susceptibility Hardened

DME Series

Motion Sensors DME series of active variable reluctance (VR) speed sensors are similiar to our standard DM series amplified sensors. The DME series offers EMI (Electromagnetic Interference) susceptability hardening and improved performance in environments with greater external electrical noise and disruptions. The DME series is equivalent to the Honeywell 584xx series while also offering CE compliance and additional pulse output offerings.

Specification Comparison with Motion Sensors DM series:

INSTALLATION CONSIDERATIONS

 DME SeriesDM Series
Input Power5 - 30 VDC8 - 30 VDC
Reverse PolarityYesYes
Short Circuit ProtectionNoYes
Current Draw21mA @ 30VDC30mA @ 30VDC
Frequency Response10Hz - 10KHz10Hz - 10KHz
Air Gap Capability.118"*.140"*
CE ComplianceYesYes

*dependent upon target geometry and construction

  • Features & Specifications
  • Standard Models
Type
Variable Reluctance (Magnetic) with EMI susceptability hardening

Physical Features

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

Input Power
5 to 30 VDC, 25 mA max. @ 30VDC
Reverse polarity protected

Pulse Output Options
Guaranteed power on state at Logic 0

  • Supply Tracking
    Logic 0:
    0.35 VDC Max @ 15VDC
    0.80 VDC Max @ 30 VDC
    Logic 1:
    (VS x RL)/(RL+2200)
  • Open Collector
    Logic 0:
    0.35 VDC Max @ 15VDC
    0.80 VDC Max @ 30 VDC
    Logic 1:
    (VS x RL)/(RL+Y*)

*Y=value of external pullup resistor

  • TTL/CMOS: fan-out of 5 TTL/CMOS loads
    Logic 0:
    0.35 VDC Max @ 15VDC
    0.80 VDC Max @ 30 VDC
    Logic 1:
    5 VDC +/- 0.5 VDC
    0-10 VDC square wave (requires 10-   30 VDC input power)
    Logic 0:
    0.35 VDC Max @ 15VDC
    0.80 VDC Max @ 30 VDC
    Logic 1:
    10 VDC +/- 1.0 VDC
Interconnection Options
  • Three (3) pin MIL-C-5015 type connector with gold plated pins; mates with MS3106-10SL-3S
  • M12x1 threaded 5 pin connector
  • Other connector types upon request
  • Pigtail with wires or cables.
  • NPT threaded body with wire or cable pigtail

Temperature Range
Operating: -40˚C to +125˚C
Storage: -65˚C to +125˚C

Pin/Pigtail Connections

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

Airgap
Up to 0.118" dependent on target geometry and sensor construction

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

Warranty
Unconditional one (1) year warranty if used within specifications

STANDARD MODELS

Variable Reluctance Active Speed Sensors

Model NumberMounting ThreadThread LengthOverall LengthTip
(Length/Dia.)		Output
(Pulse Range)
DME-15/8x181.8753.0.010/.094Supply Tracking
DME-25/8x184.05.2.010/.094Supply Tracking
DME-35/8x185.06.2.010/.094Supply Tracking

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