--- product_id: 314296580 title: "TRAXXAS Temperature & Voltage Telemetry Sensor (Long), Black, 6521" brand: "traxxas" price: "β‚Ή 2564" currency: INR in_stock: true reviews_count: 5 category: "Traxxas" url: https://www.desertcart.in/products/314296580-traxxas-temperature-and-voltage-telemetry-sensor-long-black-6521 store_origin: IN region: India --- # Accurate LiPo voltage telemetry Plug-and-play JR male connector Real-time motor temp monitoring TRAXXAS Temperature & Voltage Telemetry Sensor (Long), Black, 6521 **Brand:** traxxas **Price:** β‚Ή 2564 **Availability:** βœ… In Stock ## Summary > 🌟 Elevate your TRX4 game with telemetry that keeps you in control and ahead of the pack! ## Quick Answers - **What is this?** TRAXXAS Temperature & Voltage Telemetry Sensor (Long), Black, 6521 by traxxas - **How much does it cost?** β‚Ή 2564 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/314296580-traxxas-temperature-and-voltage-telemetry-sensor-long-black-6521) ## Best For - traxxas enthusiasts ## Why This Product - Trusted traxxas brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Easy Installation:** Zip-tie mount for quick sensor setup, no complex tools needed πŸ› οΈ - β€’ **Optimized Cable Length:** Perfect fit for TRX4 chassisβ€”no messy excess wires πŸ”„ - β€’ **Customizable Connectivity:** Supports DIY adapter mods for seamless integration without soldering πŸ”§ - β€’ **LiPo Battery Voltage Insight:** Never get caught off-guard by low voltage during intense runs πŸ”‹ - β€’ **Precision Temperature Tracking:** Stay ahead of overheating with instant motor temp alerts 🌑️ ## Overview The Traxxas Temperature & Voltage Telemetry Sensor (Long) is a precision accessory designed for TRX4 crawlers, delivering real-time motor temperature and LiPo battery voltage data. Featuring a perfectly sized cable for easy routing, a simple zip-tie mounting system, and a JR male plug for flexible connectivity, it empowers serious RC enthusiasts to monitor critical performance metrics and avoid unexpected power drops or overheating during demanding rock crawling sessions. ## Description This Is An Optional Traxxas "Long" Temperature & Voltage Sensor. Review: 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. Review: Traxxas forever - Rien a dire traxxas. Simple a brancher et simple utiliser ## Features - CLASSIC ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B006IRXF6U | | Brand | Traxxas | | Brand Name | Traxxas | | Customer Reviews | 4.6 out of 5 stars 528 Reviews | | Global Trade Identification Number | 00020334652102 | | Included Components | PARTS | | Item Dimensions | 8 x 0.3 x 13.3 centimeters | | Item Type Name | RC PARTS | | Item Weight | 0.01 Ounces | | Item dimensions L x W x H | 8 x 0.3 x 13.3 centimeters | | Item weight | 0.01 Ounces | | Manufacturer | TRAXXAS | | Material | Wire | | Material Type | Wire | | Model | TRAM6521 | | Mounting Type | Flange Mount | | Mounting type | Flange Mount | | Part Number | 6521 | | UPC | 783329517762 020334652102 885694932598 885932123412 754295192581 696748268453 | | Unit Count | 1.0 Count | | Warranty Description | NO | ## Product Details - **Brand:** Traxxas - **Item dimensions L x W x H:** 8 x 0.3 x 13.3 centimeters - **Item weight:** 0.01 Ounces - **Material:** Wire - **Mounting type:** Flange Mount ## Images ![TRAXXAS Temperature & Voltage Telemetry Sensor (Long), Black, 6521 - Image 1](https://m.media-amazon.com/images/I/61Lyq548nmL.jpg) ![TRAXXAS Temperature & Voltage Telemetry Sensor (Long), Black, 6521 - Image 2](https://m.media-amazon.com/images/I/61X5eWd8j+L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Must have for Temp/Voltage telemetry for TRX4 crawlers *by L***E on 16 June 2020* 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. ### ⭐⭐⭐⭐⭐ Traxxas forever *by E***N on 1 June 2026* Rien a dire traxxas. Simple a brancher et simple utiliser ### ⭐⭐⭐⭐⭐ Super *by I***M on 26 May 2026* This is traxxas the best in the world --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/314296580-traxxas-temperature-and-voltage-telemetry-sensor-long-black-6521](https://www.desertcart.in/products/314296580-traxxas-temperature-and-voltage-telemetry-sensor-long-black-6521) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-06-25*