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12V 40mA Digital LED Tachometer RPM Speed Meter+Hall Switch Sensor NPN Green al
● Product Description
Features:
Specifications:
Input Pulse Signal: NPN open collector, contact switch, contactless switch, level pulse
Input Signal Voltage: -30V-0.6V(low level); 4-30V(high level)
Measure Frequency Range: 9999Hz, 999.9hz, 99.99khz (automatically switchable)
Max. Input Frequency: 10KHz/100khz/300khz
Measure Accuracy: ±0.1%±1digit
Display: 0.56 green LED
Display Refresh Rate: >3times/second
Power Supply: AC/DC8-24V, 40mA
Size: 8*4.2*2.6cm/3.14*1.65*1in
Mounting Size: 8*3.9cm/3.14*1.53in
Over Range Display: The first digit displays "1" or "-1", other three digits no display
Note:
1, Connect wires correctly according to the wiring diagram.
2, Strong electromagnetic interference should be avoided, measuring lead had better to be shielded cable or twisted-pair cable.
3, Counting signal and reset signal input switch or circuit should be near the counter terminals, making signal cables as short as possible.
4, Avoid wiring in same tube or twisted with high voltage electric wire or power wire, in order to avoid unnecessary interference. If necessary, please use shielded cable, shielding layer on the counter terminal "+".
5, Mechanical switch or microswitch is not recommended, because of their relatively short life may cause mistakes after long time use.If using mechanical switch or microswitch, please try to use ones of better quality, in order to avoid error count. It is strongly recommended to use magnetic control switch.
Package Includes:
1 x RPM Meter
1 x Hall Switch Sensor
1 x Cable
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1. Our listing price includes the value of goods,packaging cost,and export taxes,not including international import duties. 2. Import duties,taxes,and charges are not included in the item price or shipping fee. 3. The import duties are buyers' responsibility.Please check with your country's customs office determine what these additional costs will be prior to your purchase. 4. All disputes arising from the import duties will be submitted to eBay for solution.
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