The Hioki DT4200 Digital Multimeter Series consist of a complete lineup of 9 models ranging from professional to industrial to pocket meters, delivering a super fast response rate and safety features that take electrical testing to a higher level. The DT4253 is a digital multimeter designed specifically for HVAC testing, with 0.5% DC V accuracy, temperature and clamp sensor testing, and wide 40Hz to 1kHz bandwidth.