The ACD-14 PLUS Digital Clamp Meter is the perfect choice for both HVAC and electrical applications due to its versatile set of features. Electricians will find itâs thin, light and versatile with thinner jaws than standard clamp meters (only 0.4â/10mm thick). Its ability to measure temperature, capacitance, and microamps are important features for HVAC technicians. The ACD-14 PLUS meter offers thinner jaws over standard clamp meters, allowing access to tight measurement areas and still accommodating conductors up to 25 mm.