The FrSky Ampere Sensor (SP-40A) can measure Current (A) and battery voltage(V) when connected between a Battery and ESC. This sensor requires a Smart Port enabled reciever such as the X series FrSky receivers like the X8R.
Dimension: 61mm x 17mm x 13mm
Measurement range: 0~40A
Maximum safe current: 40A
Maximum battery voltage: 6S
Sensor current consumption: 25mA@5V
A short video from our friend Scott Page:
I have this in my bixler2. Super easy setup. Physical setup is just connecting it in between your esc and battery. If you're already using xt60's for everything, 2 seconds and you're done. For taranis setup you just go to telemetry screen setup, set voltage to FAS and then your done. Add some alarms if you want. The nice thing about this is if you want the voltage of your packs this will give that to you also. You don't need the Telemetry X unit for voltage unless you need per cell reporting back. If all you want to know is Amps or total pack voltage and be able to put alarms to warn you when to land, you only need to purchase this one unit.
The sensor works great but I found SPort telemetry (only) works for me on the X8R when bound in (what Frsky call) Mode 5(D16) which is no jumper for binding and holding down the F/S button on reciever when using D16 mode on the Taranis.
A1 voltage telemetry was working in mode 1 D8 mode ( using a jumper over signal pins 7 and 8) but no other telemetry would work even though the documentation says it does.
Nice small Amp monitor and voltage sensor. Easy to fit into small - medium size models. Fastest shipping anywhere. Every order has been received in 2 - 3 days. Great product, Great shipping, Great price. Hard to find this service anywhere else.
The unit is small compact and well made best solution I can recommend.
Been tuning in all my smaller planes with this 40 amp sensor. I can change props on the plane and see what my actual amp loads are in flight. Been very surprising to see my actual loads compared to what I was seeing on the ground. One of the better tools for tuning in an electric plane. No more guessing.