--- product_id: 7229538 title: "6521 XO-1 Sensor Temperature and Voltage- Long" brand: "traxxas" price: "₹ 2249" currency: INR in_stock: true reviews_count: 13 category: "Traxxas" url: https://www.desertcart.in/products/7229538-6521-xo-1-sensor-temperature-and-voltage-long store_origin: IN region: India --- # Accurate voltage monitoring ±1.5% Long cable with secure flange mount High-temp sensor up to 150°C 6521 XO-1 Sensor Temperature and Voltage- Long **Brand:** traxxas **Price:** ₹ 2249 **Availability:** ✅ In Stock ## Summary > ⚡ Track Every Volt & Degree Like a Pro – Don’t Let Your RC Run Blind! ## Quick Answers - **What is this?** 6521 XO-1 Sensor Temperature and Voltage- Long by traxxas - **How much does it cost?** ₹ 2249 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/7229538-6521-xo-1-sensor-temperature-and-voltage-long) ## 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 - • **Durable High-Quality Build:** Crafted from premium materials to withstand intense RC runs and heat. - • **Precision Voltage & Temp Tracking:** Stay ahead with ±1.5% accuracy for real-time battery and motor insights. - • **Seamless Traxxas Link Integration:** Instant telemetry data sync for smarter, faster performance tuning. - • **Extended Reach, Effortless Install:** Long sensor cable and flange mount make positioning and setup a breeze. - • **Essential Upgrade for Serious RC Enthusiasts:** Replace worn sensors and never miss a beat on your vehicle’s health. ## Overview The Traxxas 6521 XO-1 Sensor Temperature and Voltage (Long) is a precision digital sensor designed for Traxxas RTR vehicles. It offers ±1.5% measurement accuracy, monitors battery voltage and motor temperature up to 150°C, and features a long cable with flange mount for flexible installation. Engineered with high-quality materials, it integrates seamlessly with the Traxxas Link system to provide real-time telemetry, helping RC enthusiasts optimize performance and prevent overheating. ## Description Product 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. Review: It's the real deal. - Works accurately and fit perfectly. Review: 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. ## Features - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B006IRXF6U | | Best Sellers Rank | #178,556 in Toys & Games ( See Top 100 in Toys & Games ) #152 in Radio Control Vehicle Speed Controls | | Brand Name | Traxxas | | Customer Reviews | 4.6 4.6 out of 5 stars (551) | | Global Trade Identification Number | 00020334652102 | | Included Components | As described | | Item Dimensions | 3.13 x 0.13 x 5.25 inches | | Item Weight | 0.01 Ounces | | Manufacturer | HRPA - Traxxas | | Measurement Accuracy | ±1.5% | | Model | TRAM6521 | | Mounting Type | Flange Mount | | Output Type | Digital | | Specific Uses For Product | Traxxas RTR vehicle maintenance and performance monitoring | | Style Name | Modern | | UPC | 783329517762 020334652102 885694932598 885932123412 754295192581 696748268453 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 150 Degrees Celsius | | Warranty Description | No Warranty | ## Product Details - **Brand:** Traxxas - **Item Weight:** 0.01 Ounces - **Item dimensions L x W x H:** 3.13 x 0.13 x 5.25 inches - **Measurement Accuracy:** ±1.5% - **Style:** Modern ## Images ![6521 XO-1 Sensor Temperature and Voltage- Long - Image 1](https://m.media-amazon.com/images/I/61Lyq548nmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ It's the real deal. *by J***S on May 17, 2025* Works accurately and fit perfectly. ### ⭐⭐⭐⭐⭐ must need *by K***S on February 23, 2026* 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. ### ⭐⭐⭐⭐⭐ Must have for Temp/Voltage telemetry for TRX4 crawlers *by L***E on June 16, 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. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/7229538-6521-xo-1-sensor-temperature-and-voltage-long](https://www.desertcart.in/products/7229538-6521-xo-1-sensor-temperature-and-voltage-long) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-04-23*