Play Detectors for Class 4 & 7 – DVSA-Approved Equipment for Professional MOT Bays

If your workshop carries out Class 4 or Class 7 MOT testing, having a reliable and fully DVSA-approved play detector is essential. At JHM Butt, we supply a professional range of Class 4 & 7 play detectors, featuring leading brands such as Ravaglioli, built to keep your MOT lane compliant, efficient and dependable day after day.

What Are DVSA-Approved Play Detectors for Class 4 & 7 Vehicles?

DVSA-approved Class 4 & 7 play detectors are precision tools designed to identify looseness, wear or excessive movement in a vehicle’s steering and suspension components. These detectors are essential for MOT testing on:

• Class 4 – Cars, passenger vehicles, and light vans

• Class 7 – Goods vehicles between 3,000kg and 3,500kg

By applying controlled movement to the wheels and suspension, the play detector exposes hidden faults that standard visual checks can miss, ensuring a more accurate and compliant MOT test.

Why Class 4 & 7 Play Detectors Are Essential for MOT Compliance

For any workshop running an MOT bay, accuracy and reliability are critical. A DVSA-approved play detector:

• Ensures your MOT tests remain fully compliant

• Improves inspection accuracy and reduces retest disputes

• Helps identify steering and suspension faults quickly and confidently

• Supports smoother workflow and shorter MOT test times

• Protects your business reputation by maintaining consistent safety standards

These detectors are not simply required, they enhance the overall performance and efficiency of your MOT bay.

Ravaglioli Play Detectors - Trusted by Workshops Across the UK

Ravaglioli is a leading name in professional workshop equipment, and their play detectors are widely regarded for:

• Exceptional reliability

• Precise movement and fault detection

• Robust build quality suited to busy MOT stations

• User-friendly operation and long-term durability
  
  

Their Class 4 & 7 play detector systems are a standout choice for workshops looking to invest in equipment that will perform consistently for years.

Frequently Asked Questions

Who needs DVSA-approved Class 4 & 7 play detectors?

Any MOT bay testing Class 4 or Class 7 vehicles must use approved equipment to remain compliant with DVSA standards. This includes independent workshops, dealer groups, and commercial vehicle testing facilities.

How do Class 4 & 7 play detectors work?

The detector applies multi-directional force to the wheels, suspension and steering, replicating real driving conditions. This reveals any excessive play, wear or fault that may compromise safety.

Is specialist training required?

Yes. Proper training ensures the equipment is used safely and effectively. At JHM Butt, we provide operational training and guidance to help workshop teams get the best performance from their play detectors.

Why Choose JHM Butt for Class 4 & 7 Play Detectors?

For over 50 years, we’ve supplied reliable, MOT-compliant equipment to workshops and testing centres across the UK. When you choose JHM Butt, you benefit from:

• Fully DVSA-approved Class 4 & 7 detectors

• Expert installation and commissioning

• Operator training and ongoing support

• Fast access to spare parts and servicing

• Trusted brands built for professional, high-volume MOT bays

Our aim is to help your MOT station deliver accurate, efficient and compliant testing—every single day.

Get Support or Request a Quote

Whether you’re upgrading existing MOT equipment or fitting out a new bay, our team is here to help.
Contact JHM Butt today for expert advice on Class 4 & 7 play detectors, garage equipment, workshop tools or spare parts.