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Availability:
Only 6 left in stock, order soon!
Arrives
Friday, Oct 30
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At a glance
- Condition
- New
- Model
- TRAM6521
- Dimensions
- 3.13 x 0.13 x 5.25 in
- Weight
- 0.27 g
- Style
- Modern
- Measurement Accuracy
- ±1.5%
- Mounting Type
- Flange Mount
- In the box
- As described
Features 3
- Functions with the Traxxas Link system to display battery voltage and temperature
- Long Temperature and Voltage Sensor with Mounting Screw
- Replacement for worn or damaged sensor
Description
Sensor, temperature and voltage (long) Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings. From the Manufacturer Traxxas has grown to become the number-1 selling name in RTR nitro and electric models for the last 4 years running. No one has done more than Traxxas to advance the RTR category with innovative thinking and fun designs that make it easy for anyone to get started in the great R/C hobby. Traxxas, truly the fastest name in Radio Control.
Specs 18
| Brand | Traxxas |
|---|---|
| Item dimensions L x W x H | 3.13 x 0.13 x 5.25 inches |
| Item Weight | 0.27 g |
| Style | Modern |
| Measurement Accuracy | ±1.5% |
| Mounting Type | Flange Mount |
| Output Type | Digital |
| Specific Uses For Product | Traxxas RTR vehicle maintenance and performance monitoring |
| Upper Temperature Rating | 150 °C |
| Style Name | Modern |
| Item Dimensions | 3.13 x 0.13 x 5.25 inches |
| Brand Name | Traxxas |
| Model | TRAM6521 |
| UPC | 783329517762 020334652102 885694932598 885932123412 696748268453 754295192581 |
| Global Trade Identification Number | 02 |
| Manufacturer | HRPA - Traxxas |
| Unit Count | 1 Count |
| Part Number | 6521 |
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Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Oct 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Must have for Temp/Voltage telemetry for TRX4 crawlers
I am using this in my TRX4 G-500 crawler. I think the temperature is very useful for heavy duty trailing or rock crawling, especially using 3s batteries. The voltage telemetry is an absolute necessity when you are using LiPo; especially when using the rig in such a way that the low-voltage feature of the Traxxas ESC may not be immediately obvious. The temperature probe installation is very easy - simply zip tie the flatter sensor part of the black hooped wire directly to the motor (any motor, Traxxas or otherwise). The readings are quick to transmit and seem accurate thus far. The wire length is just about perfect for the TRX4 chassis, with enough slack to route as desired, but not so much that you have to be creative zip tying the excess wire. The voltage installation will take some basic knowledge in electronics. Traxxas saw fit to fit the voltage wire with a JR male plug with a single wire to be attached to the positive power source. Using the Traxxas battery adapter is not possible without modification of the TRX4 ESC battery connector (which I am unwilling to do on a new rig). Many folks simply solder the red wire to the positive terminal of the ESC connector, and this is fine. However I prefer a plug/unplug option that doesn't require modification or soldering of the TRX4's connection. Because the xl-5 hv ESC comes with a full-voltage takeoff that runs straight to the battery (as confirmed by multimeter measurements using 3 different batteries), I decided to use that as my source for telemetry. However, the takeoff uses a JST male connector. So I simply built a JST female to JR female connector by soldering 2 red 20AWG wires attached to the respective terminals. I completely removed the black wire and the terminals originally attached to the stock connectors. I made the length long enough to feed under the battery tray, but not be too slack. Before attaching to the telemetry connector, I ensured perfect continuity from the red ESC battery connector to the final plug. Out of curiosity I plugged the telemetry unit and checked its continuity, and found that a 9.05Ohm resistor is wired into the unit. That same resistance was present without anything plugged into the telemetry cable... which explains how it works in the receiver box. The later model TRX4s (including the G-500) have BEC voltage going to the receiver. As a result, the telemetry picks up on this steady voltage and reports it to the transmitter *even when the voltage telemetry wire is not connected to the battery*. I would *not* trust this for good battery voltage reporting as it will mask the actual voltage coming from the battery. When I plugged the battery to the telemetry terminal, I could tell I was obtaining real-time voltage -- prior to connection, there was no momentary drop of voltage when I quickly throttled up the motor; post connection, the telemetry showed the momentary voltage dip one would expect from a quick throttle up. Getting the telemetry unit to fit in the receiver box was a bit tedious, but not hard really. I do wish there was perhaps 2-4mm of red wire to make it a little easier. So, save the money on the half-useless Traxxas adapter, buy some bulk connectors with cables and solder your own JR female - JST female adapter. $3 for the temperature mount is silly in my opinion since I connected mine with a zip tie for effectively less than 10 cents.
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Reviewed in the United States on June 16, 2020 by Lee
It's the real deal.
Works accurately and fit perfectly.
Reviewed in the United States on May 17, 2025 by Jose A Ramos
must need
This Traxxas temperature and voltage sensor worked exactly as I hoped. Installation was straightforward, and the long cable made it easy to position where I needed it in my RC. The readings in my telemetry system have been accurate and helpful for monitoring battery voltage and motor temperature during runs. It’s been a useful upgrade that helps me keep better track of performance and avoid overheating.
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Reviewed in the United States on February 23, 2026 by Kenneth Lucas
Not in original packaging.
Item was as described, except it was not in the original traxxas packaging. Came with a free RPM sensor I do not currently have a use for. Lost one star for package, otherwise exactly as described.
Reviewed in the United States on March 29, 2021 by August M Cook-Gregoire
Great addition!
Much better than sticking your finger on the motor, lol! I have the Traxxas cooling fins on my motor, and this does fit on there, but you have to get it all the way in the back of the motor near the plastic cap, and you have to cut off part of the Traxxas sticker so it makes contact with the metal, but it does fit with the cooling fins.
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Reviewed in the United States on November 18, 2025 by London
Happy
Happy
Reviewed in the United States on January 26, 2026 by Wally J.
Good
Nice add on Easy to install
Reviewed in the United States on April 1, 2024 by alan houghtaling jr
Good product
Works how I expected, traxxas makes the new connection for the new plugs. “Power taps”. They just started producing them this month. If all you care about is temp like me you can run both wires in the receiver.
Reviewed in the United States on March 13, 2021 by david