--- product_id: 34692438 title: "Happybuy Differential Temperature Controller T2-T1 Thermostat Water Heater, Pool Solar Panel Pump 2 Sensors Fahrenheit Celsius" brand: "happybuy" price: "68307CFA" currency: XOF in_stock: true reviews_count: 12 category: "Happybuy" url: https://www.desertcart.sn/products/34692438-happybuy-differential-temperature-controller-t2-t1-thermostat-water-heater-pool store_origin: SN region: Senegal --- # 2 waterproof sensors Dual output relays 0.1° precision control Happybuy Differential Temperature Controller T2-T1 Thermostat Water Heater, Pool Solar Panel Pump 2 Sensors Fahrenheit Celsius **Brand:** happybuy **Price:** 68307CFA **Availability:** ✅ In Stock ## Summary > 🌞 Master your climate with precision and power — never miss the perfect temp again! ## Quick Answers - **What is this?** Happybuy Differential Temperature Controller T2-T1 Thermostat Water Heater, Pool Solar Panel Pump 2 Sensors Fahrenheit Celsius by happybuy - **How much does it cost?** 68307CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/34692438-happybuy-differential-temperature-controller-t2-t1-thermostat-water-heater-pool) ## Best For - happybuy enthusiasts ## Why This Product - Trusted happybuy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Temp Scale:** Effortlessly switch between Celsius and Fahrenheit to suit your preference or project needs. - • **Wide Operating Range:** Handles extreme temps from -50°C to 110°C (-22°F to 230°F), perfect for solar, pool, or cellar setups. - • **Dual Relay Powerhouse:** Simultaneously manage pump circulation and heating systems with two independent outputs. - • **Robust Waterproof Sensors:** Includes two durable, waterproof probes with 3M cables for reliable, long-term outdoor use. - • **Pinpoint Temperature Accuracy:** Control your system with ultra-fine 0.1°C/°F resolution for flawless thermal management. ## Overview The Differential Temperature Controller T2-T1 is a high-precision thermostat designed for solar water heating, pool pumps, and heating systems. Featuring 0.1°C/°F resolution, dual waterproof sensors, and two output relays, it automates pump and heater control based on temperature differentials. With a wide operating range (-50°C to 110°C) and selectable Celsius/Fahrenheit display, it ensures efficient, reliable temperature management for professional and home applications alike. ## Description Mini temperature controller thermostat for solar heating water, pump, . . . . with a washer type temperature Sensor This controller is used in a solar water system for controlling the pump (The temperature difference between the two probes) & Heating system (The set pt. Temperature). it has two internal output relays which control the pumps & Heating system. When the temperature reaches the differential set value (t2-t1), it automatically runs the circulation pump, until the two temperature zones reach equilibrium according to your setting, the S relay can be used to control electric heating when the solar heating has failed to reach the set temperature. The electric heating system can automatically start heating to the set temperature, temperature difference controls & automatic constant temperature with in the set range. One set included 1 x mini-temperature controller 2 x temperature Sensor probe with 3M cable 1 x Instruction manual Review: What they don't tell you. - very good solution for fan cooling in our root cellar. We set it up opposite of the directions for solar hot water systems. It also helps to maintain the proper humidity for vegetable storage, not too high or low. We used a power relay to protect the controller, as suggested, and set the differential at only 3ºF. For humidity control, this setting works best in New Mexico. In wetter conditions, use higher differentials. Last issue, use a larger radial fan than the normal household vent system - - you need to move more air than you may think to get good results. Review: It works for my solar hot water system - Used this to replace a solar hot water controller damaged by lightening. It seems to be working. The wiring was not entirely intuitive, but the directions were reasonable. Unit is supposed to fit into some kind of electronics cabinet that is not included, unlike the fully enclosed unit I had before. ## Features - it is accurate controller with 0.1 C or 0.1 F resolution controlling and Selection between Celsius and Fahrenheit - Included Temperature controller,2 water proof sensors, manual and Wiring diagram for installation - Equipped with 2 output (one for controlling differential value T2-T1 and another for controlling heating system) and Temperature Calibration for 2 sensors - Temperature Range -22 ~ 230 °F (-50 ~ 110 °C) and Power Supply: 100-120 V AC/DC with 10 Amp builtin relay - Shipping to USA is 3-6 business days. For more information please go to our website Thermomart ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01ETRIZUG | | Best Sellers Rank | #1,610,704 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #447 in Swimming Pool Heat Pumps | | Brand Name | Happybuy | | Color | 2 Sensors | | Customer Reviews | 4.3 4.3 out of 5 stars (24) | | Display Type | digital | | Item Type Name | Happybuy Temperature Controller | | Item Weight | 1.5 Pounds | | Manufacturer | Happybuy | | Material Type | SMD | | Model | 2 Sensors | | Operating Temperature | 230 Degrees Fahrenheit | | Part Number | 769675369279 | | UPC | 769675373689 769675369279 769675368906 | | Voltage | 120 Volts | ## Product Details - **Brand:** Happybuy - **Color:** 2 Sensors - **Item Weight:** 1.5 Pounds - **Material:** SMD - **Voltage:** 120 Volts ## Images ![Happybuy Differential Temperature Controller T2-T1 Thermostat Water Heater, Pool Solar Panel Pump 2 Sensors Fahrenheit Celsius - Image 1](https://m.media-amazon.com/images/I/81mt+Ii40VL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ What they don't tell you. *by A***L on August 4, 2017* very good solution for fan cooling in our root cellar. We set it up opposite of the directions for solar hot water systems. It also helps to maintain the proper humidity for vegetable storage, not too high or low. We used a power relay to protect the controller, as suggested, and set the differential at only 3ºF. For humidity control, this setting works best in New Mexico. In wetter conditions, use higher differentials. Last issue, use a larger radial fan than the normal household vent system - - you need to move more air than you may think to get good results. ### ⭐⭐⭐⭐⭐ It works for my solar hot water system *by P***M on September 19, 2019* Used this to replace a solar hot water controller damaged by lightening. It seems to be working. The wiring was not entirely intuitive, but the directions were reasonable. Unit is supposed to fit into some kind of electronics cabinet that is not included, unlike the fully enclosed unit I had before. ### ⭐⭐⭐⭐⭐ 👍🏻 *by D***Y on October 14, 2019* So far so good. --- ## 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.sn/products/34692438-happybuy-differential-temperature-controller-t2-t1-thermostat-water-heater-pool](https://www.desertcart.sn/products/34692438-happybuy-differential-temperature-controller-t2-t1-thermostat-water-heater-pool) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-07-14*