The Smart Port Brushles RPM and dual temperature sensor plugs it into a Smart Port equipped receiver (X series, will not work with D series receivers). Join the red and black wires to any 2 of the 3 wires going to your brushless motor, and you can now read the RPMs. You will need to identify how many poles your motor has and that is about it. Now you can fine tune your prop/motor/battery combinations without guessing anymore! See what that prop is actually doing in the air. But FrSky has even more to offer. What good is knowing the RPM if we don't know how our temps are doing too? So FrSky has included not one, but 2 temperature sensors. Now we can make sure our new prop is not cooking our speed control or battery!
Dimension: 29mm x 20mm x 2mm
Operational Voltage: 4 - 10 volts
Current Draw: 25mA @5V
Voltage Range of Motor Wires: 2 to 12S Lipo
RPM Range: 1,000 to 300,000 RPM (for 2 pole motor)
Temperature Range: -20 to 250° Celsius (-4 to 482° Fahrenheit)
Smart Port ID: 5 (Can be changed with servo Channel changer)
Compatibility: FrSky Smart Port enabled receivers such as the X8R, X6R, X4R, etc. coupled with a Taranis transmitter.
Early Taranis transmitter users may require a firmware update to take full advantage of this sensor.
Here is a video of the setup and use of the RPM and temp sensors on a T-Rex 500 heli.
This is an exceptionally accurate and easy to use product. I have a Taranis "B" (not a Plus model) running fairly up-to-date firmware. The RPM is dead-on accurate, easy to setup, and logs very reliably. The temp sensor also is fantastic. I run this sensor, along with the mini voltage sensor on a X8R receiver in all of my E-F1 race planes. These telemetry settings help me to track battery and motor health and ensure that my planes are performing at their peak. Great product, great prices!
I purchased this sensor to use with a [pre-Plus] Taranis X9D running the official FrSky firmware (v1.1.02 as of this writing). The good news is I have compared the temperature probes against an accurate thermometer and found them to be right on the money. The bad news is the RPM sensor will not report the correct RPM with this radio/firmware combo. After many emails back and forth, FrSky's only "resolution" for this issue is to flash Taranis with the unofficial OpenTX v2.xx firmware. Unfortunately, I cannot report if this will indeed fix this issue since I am not willing to go there yet. So just be aware that if you have an original Taranis running official firmware, you will not get the correct RPM displayed. With correct RPM, I would rate this sensor 5 stars.
Performs as expected Relatively easy setup as instructions