DF6100-EH handheld Doppler external clip ultrasonic flowmeter   Small size, easy to carry and easy to operate.  Rechargeable lithium battery can work continuously for 14 hours.  Non-contact measurement, no need to disconnect or stop the flow during installation.  Measurement accuracy 0.5-2% FS.  Self-adjusting signal gain adjustment.  It can resist the interference of the inverter.  It is easy to operate, just input the inner diameter to achieve flow measurement.  Transient flow and cumulative flow pulse output and flow alarm output.  2-line 8-bit LCD, which can display information such as transient flow, accumulated flow, and flow rate.