What is a Play Detector?


A play detector is used within an MOT bay to eliminate test assistance from a 3rd party and to repeatably inspect both the steering and suspension elements of the subject vehicle.

Play detection equipment can be installed into an inspection pit or within dedicated recesses within a lift’s platform.

Designs of play detection equipment vary greatly. Dual plates systems, single plate systems, hydraulic and pneumatically actuated etc.

History of Play Detectors

Play Detection in MOT bays first saw light of day within the MOT scheme when in 2005 ATL test bays first became available.

Initially designs were fairly “robust” in the way they examined the steering elements as the DVSA specification for the equipment was for a minimum force to be applied – these designs were thrust onto existing lifts in production such that the lifts moved and pantographed when the play detectors operated –

It is from here that the old-wives tale I still hear from time to time today started…

“A scissor lift is more suitable for ATL testing due to it’s stability.”

Differences between single & dual plate systems

Essentially there is no operational difference that might guide one toward one system or the other. In a dual plate arrangement, one plate drives the suspension elements side to side and the other rotates the steering. A single plate system simply has all the actuators to achieve this housed within thr single plate design.

The only advantage you could see with a single plate system is that only half of the groundwork costs are incurred.

GETECH Play Detectors

GETECH GE457We have a single plate design play detector approved for use on inspection pits and options for dual or single plate systems on lifts.

The GE457PD is operated using a wired remote control with integrated controls and torch through a complete single cycle (side to side or rotationally) returning the plate back to the original centre-line location.

This allows the examiner to concentrate on observing the effect of the examination rather than controlling the operation of the actual play detection equipment.

At all times during the operation cycle the hand lamp remains illuminated and, by design, the forces exerted by the play detector are less than those exerted by the test surface on the slave side. This, as was mentioned above, makes it impossible to damage the vehicle. Despite the low force input to prevent vehicle damage, our play detector exceeds the VOSA force input requirement.

Watch the video by clicking this link…

Designed specifically for mot pit based installations, our single plate play detector can be used to upgrade an existing test station to One Person Testing (OPTL) or as part of an automated test lane (ATL).

The unit requires a three phase, 16 amp electrical supply and the GETECH GE457PD Hydraulic Play Detector comes with a 5 year warranty and an optional service contract to maintain it is also available.

You can even buy the GE457PD online! Visit getech.org.uk to go straight to the page where a special price awaits you! Alternatively call 0844 800 9785 and speak to any of our MOT equipment experts during normal office hours.

For more information on GETECH call during office hours, visit http://getech.org.uk or mail info@getech.org.uk


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