JCB Boom Proximity Switch. Proximity switch used for a variety of sensors in steering/axle/controls instillation on a variety of JCB machines. Used to detect nearby objects without physical contact. 15mm normal sensing distance. Fitting the below machines. Established in 1971, Hunt Forest Group is a family owned business. We offer genuine parts, along with agricultural, golf, turf and plant machinery from 8 branches across Southern England. You can also collect fro. Rooms offering a vast selection of John Deere Lawn Mowers, Stihl & Husqvarna Machinery, John Deere Tools, Clothing and Children’s Toys. Head Office: Hunt Forest Group, Martins L. Ane, Chilbolton, Stockbridge, Hampshire, SO20 6.