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3070A35
Overview
Hazardous Location VRS sensors are designed for use in locations where explosion-proof or intrinsically safe sensors are required.
Passive VRS (Variable Reluctance Speed) Magnetic Speed sensors are simple, rugged devices that do not require an external voltage source for operation.
A permanent magnet in the sensor establishes a fixed magnetic field. The approach and passing of a ferrous metal target near the sensor’s pole piece (sensing area) changes the flux of the magnetic field, dynamically changing its strength. This change in magnetic field strength induces a current into a coil winding which is attached to the output terminals.
The output signal of a VRS sensor is an ac voltage that varies in amplitude and wave frequency as the speed of the monitored device changes, and is usually expressed in peak to peak voltage (Vp-p).
One complete waveform (cycle) occurs as each target passes the sensor’s pole piece. If a standard gear were used as a target, this output signal would resemble a sine wave when viewed on an oscilloscope.
Honeywell also offers VRS sensors for general purpose, high output, power output, high resolution and high temperature.
Technical Specifications
| Output Voltage (Peak to Peak) Min. | 60 Vp-p |
| Operating Frequency | 40 kHz |
| Diameter | 19,5 mm [0.750 in] |
| Mounting Thread | 3/4-20 UNEF-2A |
| Material | Stainless Steel Threaded |
| Housing Length | 122 mm [4.80 in] |
| Termination | 18 AWG PVC-Insulated Leads, 3000 mm [120 in] |
| Operating Temperature | -73 °C to 93 °C [-100 °F to 200 °F] |
| Gear Pitch Range | 12 DP (Module 2.11) or Coarser |
| Optimum Actuator | 8 DP (Module 3.17) Ferrous Metal Gear |
| Surface Speed | 0,38 m/s [15 in/s] |
| Test Condition Specifications | Surface Speed = 25 m/s [1000 in/s], Gear = 8 DP [Module 3.17), Air Gap = 0.127 mm [0.005 in], Load Resistance = 100 kOhm |
| Coil Resistance | 191 Ohm to 280 Ohm |
| Pole Piece Shape and Size | Round; 4,75 mm [0.187 in] Diameter |
| Inductance | 115 mH |
| Vibration | MIL-STD 202F, Method 204D |
| Weight | 322 g [11.5 oz] |
| Comments | When properly installed using the explosion containment method, this product is certified for use in hazardous locations as follows: Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III. This product has been tested to and meets the requirements of applicable U.S. and Canadian specifications for these locations. |
| Series Name | Hazardous Location |
Technical Specifications
| Output Voltage (Peak to Peak) Min. | 60 Vp-p |
| Operating Frequency | 40 kHz |
| Diameter | 19,5 mm [0.750 in] |
| Mounting Thread | 3/4-20 UNEF-2A |
| Material | Stainless Steel Threaded |
| Housing Length | 122 mm [4.80 in] |
| Termination | 18 AWG PVC-Insulated Leads, 3000 mm [120 in] |
| Operating Temperature | -73 °C to 93 °C [-100 °F to 200 °F] |
| Gear Pitch Range | 12 DP (Module 2.11) or Coarser |
| Optimum Actuator | 8 DP (Module 3.17) Ferrous Metal Gear |
| Surface Speed | 0,38 m/s [15 in/s] |
| Test Condition Specifications | Surface Speed = 25 m/s [1000 in/s], Gear = 8 DP [Module 3.17), Air Gap = 0.127 mm [0.005 in], Load Resistance = 100 kOhm |
| Coil Resistance | 191 Ohm to 280 Ohm |
| Pole Piece Shape and Size | Round; 4,75 mm [0.187 in] Diameter |
| Inductance | 115 mH |
| Vibration | MIL-STD 202F, Method 204D |
| Weight | 322 g [11.5 oz] |
| Comments | When properly installed using the explosion containment method, this product is certified for use in hazardous locations as follows: Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III. This product has been tested to and meets the requirements of applicable U.S. and Canadian specifications for these locations. |
| Series Name | Hazardous Location |
Documents
| TITLE | DOCUMENT TYPE | LANGUAGE | SIZE |
| Hazardous Location Series Industrial VRS Magnetic Speed Sensors | Datasheet | English | 244KB |
|---|---|---|---|
| Single and Dual Channel Barrier Control Drawing | Technical Information | English | 65KB |
| Speed Sensors Range Guide | Product Range Guide | English | 767KB |
| Sensors and Switches in Front Loaders | Application Note | English | 3MB |
| VRS Industrial Magnetic Speed Sensors Application Note | Application Note | English | 530KB |
| VRS Sensor Application Notes | Application Note | English | 101KB |
| VRS Output Voltage Calculations | Technical Information | English | 46KB |
| Magnetic Sensors Line Guide | Line Card/Selection Chart | English | 359KB |
Product Features
- Self-powered operation
- Direct conversion of actuator speed to output frequency
- Simple installation
- No moving parts
- Designed for use over a wide range of speeds
- Adaptable to a wide variety of configurations
- Customized VRS products for unique speed sensing applications
- Housing diameters: 3/4 in, 5/8 in
- Housing material/style: stainless steel threaded
- Terminations: MS3106 connector, preleaded
- Output voltages: 30 Vp-p to 60 Vp-p
Applications
- Engine RPM (revolutions per minute) measurement on aircraft, automobiles, boats, buses, trucks and rail vehicles
- Motor RPM on oil and gas drilling equipment and machinery
- Motor RPM measurement on drills, grinders, lathes and automatic screw machines
- Process speed measurement on food, textile, paper, woodworking, printing, tobacco and pharmaceutical industry machinery
- Motor speed measurement of electrical generating equipment in grain elevators, sawmills and other potentially explosive environments
- Speed measurement of pumps, blowers, mixers, exhaust and ventilating fans
- Gear speed measurement