The Circuit Check Signature Series pneumatically actuated test fixtures known as PDs for Pneumatic Drive offer smooth controlled actuation for as many as 12,000 test points. Controlled operation probing test pads as small as 0.012″ on 25mil centers is supported. The 5th generation PD is a testament to its versatility and reliability, as it has been a proven product for 30 years and can support over a million cycles. Circuit Check PDs can be configured for in-circuit test or as a functional test fixture. Circuit Check inventories sizes for circuit boards up to 26″ x 18″, with custom PDs fabricated upon request.