*Efficient, beneficial, and low cost.
*Measurement frequency range: DC~20KHz, low power consumption 10mA.
*Measurement input without loss; Strong anti-interference ability.
*Lightweight structure for easy installation. Opening size φ21mm.
*No low-temperature drift, strong current overload capacity.
*DTM-O21 is a current comparator made using the Hall effect principle, suitable for measuring direct current.
*Open structure design, convenient for continuous electrical installation, with screw fixation design at the 
opening and closing parts, safe and firm to prevent detachment.