It has been widely applied in the slot-type mounted electric energy meter, small-size electric energy meter, intellectual gas-fired meter, intellectual water gauge, multi-house electric energy meter and other occasions which require counting,and is the first mass production and export at home . Main technical indexes: Operating voltage: DC5V positive pulse Operating power loss: ≤125mW; Pulse width: 20-320ms, finest 50ms; Extrior magnetic interference resistance: Larger than 3000mT, it can also install iron sheet shield case; Pulse ratio: 10：1； Resistance: 200Ω±20Ω Ambient air temperature: －10°C～＋60°C Service life: larger than 10 years; Weight: 11g Installation mode: weld 4￠0.6 contact pin to the circuit board; Display digit: one decimal, five integers (5+1). Note:Need not decimal place,please remark it when you order.