Instrument companies have found that HVACR technicians are demanding instruments that offer a more compact design that require less space, offer greater safety, and are easy-to-use when measuring the large number of parameters required by their jobs. The response by some manufacturers has been modular design.
Modular design enables field service technicians to carry less equipment, test a wider variety of parameters, and, because all the test modules work the same way, perform most tests more easily.