:help:
I am looking for nib or used tachometer.
hi,
You can use this
Battery Checker/Watt Meter/Servo Tester – Turnigy™ 7in1 Mega Meter
http://www.rcproduct.in/product/battery-checkerwatt-meterservo-tester-turnigy-7in1-mega-meter/
Which have inbuilt
Functions:
Battery Cell/Voltage Checker
Battery Internal Resistance Checker
Watt Meter (Amps/Watts/Volts)
Servo Tester
Optical Tacho
Temp Gauge
Thrust Calculator
Battery Internal Resistance Meter
Bought from ebay