Fifth Wheel

336 Mountain Way Drive
Orem, UT 84058 U.S.A.
Telephone: (801) 225-8970
Fax: (801) 225-9008
E-mail: info@gmheng.com

HFW80 Fifth Wheel Sensor

Engineered for all types of uses involving vehicle speed and distance measurements, the HFW80 Fifth Wheel Sensor is accurate, reliable, rugged, and easy to use.

The fifth wheel features a high resolution optical encoder and low wheel tire growth to ensure excellent accuracy. A helical torsion spring keeps it in contact with the ground at all times to ensure correct surface tracking.

The fifth wheel is manufactured using high strength material and is ruggedly constructed to withstand high g impacts sustained in vehicle crash tests.

The output of the sensor is a TTL compatible digital pulse which may either be used to measure speed or distance traveled. A digital readout is available. Or, the sensor can interface directly with many different types of off-the-shelf hardware such as digital tachometers. It can also be integrated into electronic control systems or data acquisition systems.

A powerful helical torsion spring keeps the wheel in contact with the ground at all times.

Typical Applications

Vehicle ground speed measurement
Vehicle crash testing
Speedometer calibrating
Length or distance measurements

Features

Spring loading
Rugged, impact hardened
Digital pulse output
Low power requirement

Specifications

Output		Length

Digital Optical Encoder TTL Compatible 1024 Counts/Revolution (other counts available)		Overall Length = 46" (1.17 m) Swing Arm Length = 33" (0.84 m)

		Material
Speed Measurement
		Arm, Mount & Pivots: 6061T6 Aluminum Axle: Hardened & Ground Steel Wheel: ABS Plastic
Range:	0 to 80 mph (130 km/h)
Accuracy:	Better than 0.2 mph (0.33 km/h)

Wheel		Temperature Range

16" Pneumatic Tire (~15.5" or 39 cm O.D.)		-40º to 100º C

Wheel Tire Growth		Weight

Less than 0.5% @ 50 mph (80 km/h)		20 lbs (9 kg)

Power Supply		Cable

4.5 to 5.5 VDC		20 feet (6 m) - 4 conductor - tinned leads

Accessories Available:

Custom Mounting Brackets

Digital Display


Fifth Wheel Dimensions (in inches)	Mounting Pattern (in inches)

The HFW80 Fifth Wheel is in stock ready to ship. Please contact GMH Engineering for current pricing. (801) 225-8970 or info@gmheng.com

Information furnished by GMH Engineering is believed to be accurate and reliable. No responsibility is assumed by GMH Engineering for its use, whether correct or incorrect. Nor can GMH Engineering be held liable for consequences for any infringements of patents or other rights of third parties which may result from its use. Information in this document is current as of date of writing and is subject to change.