HEATIT ET-31/32 Temperature Controller Thermostat 120V Single Relay

ET-31

• 【PLUG-AND-PLAY, NO WIFI NEEDED】 Simply plug into a standard 120V outlet, connect your heating or cooling device, and set your target temperature with the + / – buttons — no app, no WiFi, no pairing required. The large LED display shows real-time temperature clearly, and the three-button interface makes setup straightforward for anyone. Short press the middle button to power on/off; long press “+” to switch °F/°C instantly. Perfect for users who prefer reliable, standalone control without smart-home complexity.
• 【HEATING OR COOLING DUAL MODE, SINGLE RELAY OUTPUT】 Select heating mode (HEA) for seedling mats, fermentation heaters, or reptile enclosures; select cooling mode (Coo) for small fridges, fermentation chillers, or greenhouse ventilation. Heating equipment up to 1200W (10A max); refrigeration/cooling equipment up to 480W (4A max) at 120Vac 60Hz. This is a single-relay device — it controls one device at a time, either heating OR cooling. Adjustable temperature differential (1–30°F, default 3°F) for both modes.
• 【HIGH-PRECISION NTC SENSOR, WIDE TEMPERATURE RANGE】 Industrial-grade NTC 10K/3950 temperature sensor with a 6.56ft (2m) waterproof probe delivers 0.1°F/°C display resolution below 100°F/°C. Measurement range: -22°F to 210°F (-30°C to 99°C); setpoint adjustable in 1°F / 0.5°C increments. Sensor calibration function (±10°F) lets you fine-tune accuracy for your specific environment. °F and °C switchable with a long press of the “+” key.
• 【BUILT-IN SAFETY & PROTECTION FEATURES】 Compressor delay protection (1–10 min, default 3 min) prevents frequent cycling and extends fridge/compressor life — the blue indicator blinks while waiting. High-limit (default 200°F) and low-limit (default -12°F) temperature alarms with a blinking red/blue indicator and “ALA” + “HL”/”LL” on screen alert you to out-of-range conditions. Built-in countdown timer (long press “-” to set) auto-shuts off the device when time expires. Factory reset available to restore default settings.
• 【WIDE APPLICATIONS, INDOOR USE ONLY】 5ft (1.5m) power cord, no wiring required. Perfect for seed germination, seedling heat mats, plant propagation & rooting, home brewing, fermentation (kombucha, yogurt, sourdough, kimchi), reptile & amphibian enclosures, small greenhouses, incubation, aquarium heaters, and any temperature-critical project where simple, reliable control matters. Keep away from children; do not use with extension cords or power taps to reduce electric shock risk; keep the unit dry and indoors only.

ET-31W

• 【WIFI SMART APP REMOTE CONTROL】 Built-in 2.4GHz WiFi connects to the Warmme APP (iOS & Android), allowing you to monitor real-time temperature, adjust setpoints, and switch heating/cooling modes from anywhere. Supports OTA firmware upgrades so your device stays up to date without replacing hardware. The WiFi icon on the display clearly shows connection status; auto-switches to Hold mode if the network drops, ensuring uninterrupted temperature control.
• 【HEATING & COOLING DUAL MODE, SINGLE RELAY OUTPUT】 One relay output supports either heating OR cooling mode (selectable via menu). Heating equipment up to 1200W (10A max); refrigeration/cooling equipment up to 480W (4A max) at 120Vac 60Hz. Plug-and-play design — simply plug your heater, seedling mat, fermentation heater, or small fridge into the outlet socket, set your target temperature, and the controller automatically powers the device on/off. Ideal for growers, brewers, and hobbyists who need one device to manage either heat or cold.
• 【HIGH-PRECISION NTC SENSOR, WIDE TEMPERATURE RANGE】 Industrial-grade NTC 10K/3950 temperature sensor with a 6.56ft (2m) cable delivers 0.1°F/°C display resolution below 100°F/°C. Measurement range: -22°F to 210°F (-30°C to 99°C); setpoint adjustable in 1°F / 0.5°C increments. The sensor calibration function (±10°F) lets you fine-tune accuracy for your specific environment.
• 【ADVANCED PROTECTION & PROGRAMMABLE FEATURES】 Weekly scheduling (7-day individual or 5+1+1 mode) configurable only via the APP, with 4 temperature stages per day. Built-in countdown timer auto-shuts off the device. Compressor delay protection (1–10 min, default 3 min) prevents frequent cycling and extends fridge/compressor life. High-limit (default 200°F) and low-limit (default -12°F) temperature alarms with a blinking indicator and “ALA” on screen alert you to out-of-range conditions. °C/°F switchable, factory reset available.
• 【PLUG-AND-PLAY, WIDE APPLICATIONS】 5ft (1.5m) power cord, indoor use only. No wiring required — plug into a standard 120V outlet and connect your equipment. Perfect for seed germination, seedling heat mats, plant propagation & rooting, home brewing, fermentation (kombucha, yogurt, sourdough), reptile & pet enclosures, greenhouses, incubation, and small-scale temperature-critical projects. Keep away from children; do not use with extension cords or power taps to reduce electric shock risk.

ET-32

ET-32 Temperature and Humidity Controller combines high precision, stable performance, and plug-and-play convenience. With clear digital display for real-time monitoring and manual adjustment, it supports accurate temperature and humidity control without network. Dual relay output can independently or simultaneously drive heating, cooling, humidification, and dehumidification equipment. With high-precision sensors and wide measurement range, it is widely used for seed germination, brewing, fermentation, rooting, greenhouse, and incubation. Reliable performance, easy operation, and stable output make it an ideal environmental controller for home and commercial use.

ET-32W

• 【WIFI SMART APP REMOTE CONTROL & OTA】 Built-in 2.4GHz WiFi connects to the free Warmme APP (iOS & Android), letting you monitor real-time temperature AND humidity, adjust setpoints, switch control modes, and create weekly schedules from anywhere. Supports OTA firmware upgrades so your device stays current without hardware replacement. The WiFi icon on the dual display shows connection status; if the network drops, the controller automatically switches to Hold mode to maintain your settings without interruption.
• 【DUAL RELAY OUTLETS, 3 CONTROL MODES】 Two independent relay outlets (WORKING1 red / WORKING2 blue) drive up to two devices simultaneously. Choose from three modes: (1) Temperature only — outlet 1 for heating, outlet 2 for cooling; (2) Humidity only — outlet 1 for humidifier, outlet 2 for dehumidifier; (3) Simultaneous temperature & humidity — assign each outlet to heat/cool/humidify/dehumidify as needed. Heating equipment up to 1800W (15A); refrigeration/cooling equipment up to 720W (6A) at 120Vac 60Hz. Perfect for grow tents, mushroom cultivation, and fermentation where both temp and humidity matter.
• 【DUAL HIGH-PRECISION SENSORS, DUAL DISPLAY】 Industrial-grade NTC 10K/3950 temperature probe (6.56ft / 2m cable) measures -22°F to 210°F (-30°C to 99°C) with ±0.5°F accuracy and 0.1°F resolution. Dedicated humidity sensor (3.6ft / 1.1m cable) measures 5–99%RH with ±3%RH accuracy and 1%RH resolution. The dual LED display shows PV (current temperature) on the top row and SV (setpoint / humidity) on the bottom row simultaneously, so you can read both values at a glance. Temperature calibration (±10°F) and humidity calibration (±10%RH) available for fine-tuning.
• 【COMPREHENSIVE SAFETY & ALARM SYSTEM】 Compressor delay protection (1–10 min, default 3 min) prevents frequent cycling and extends compressor life — the cooling indicator blinks while waiting. High-temp (default 200°F) and low-temp (default -12°F) alarms; high-humidity (default 99%RH) and low-humidity (default 5%RH) alarms. Sensor failure detection for both temperature and humidity probes. All alarms trigger a buzzing beeper AND stop all outputs automatically; press any key to silence the buzzer. °F/°C switchable, factory reset available. IP31 rated for indoor use.
• 【PLUG-AND-PLAY, WIDE APPLICATIONS】 5ft (1.5m) power cord, no wiring required — plug into a standard 120V outlet, connect your devices to the two outlets, and set your targets. Ideal for seed germination, seedling heat mats, plant propagation & rooting, mushroom cultivation (monotub / grow tent), home brewing, fermentation (kombucha, yogurt, sourdough, kimchi), reptile & amphibian enclosures, small greenhouses, incubation, cigar humidors, and any project requiring precise temperature AND humidity control. Keep away from children; do not use with extension cords or power taps; indoor use only.