---
product_id: 298747273
title: "KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan"
brand: "ketotek"
price: "NT$3235"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/298747273-ketotek-digital-temperature-controller-thermostat-plug-socket-with-waterproof-sensor
store_origin: TW
region: Taiwan
---

# Max 10A dual relay output 2m waterproof NTC sensor Precision -50℃ to 99℃ control KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan

**Brand:** ketotek
**Price:** NT$3235
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay cool or heat up—control your climate like a pro!

## Quick Answers

- **What is this?** KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan by ketotek
- **How much does it cost?** NT$3235 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/298747273-ketotek-digital-temperature-controller-thermostat-plug-socket-with-waterproof-sensor)

## Best For

- ketotek enthusiasts

## Why This Product

- Trusted ketotek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable Safety First:** Fire-resistant build + buzzer alerts keep your environment secure 24/7
- • **Versatile Application:** Ideal for aquariums, greenhouses, and any temperature-sensitive setup
- • **Plug-and-Play Simplicity:** Set up in seconds with an intuitive 3-button interface—no tech degree needed
- • **Smart Memory & Calibration:** Never lose your settings; calibrate for spot-on temperature accuracy
- • **Dual-Stage Precision Control:** Seamlessly switch between heating & cooling for perfect climate balance

## Overview

The KETOTEK KT4000 is a robust digital thermostat plug featuring dual relay outputs for heating and cooling with a max 10A 220V capacity. It offers precise temperature control from -50℃ to 99℃ using a 2-meter waterproof NTC sensor, perfect for aquariums, greenhouses, and more. Its user-friendly 3-button interface, fire-resistant design, built-in buzzer alarm, memory retention, and calibration functions ensure reliable, safe, and accurate temperature management in any environment.

## Description

KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan

## Features

- Plug-and-play design, dual relay outputs for heating and cooling. The dual-stage function allows you to control heating devices, cooling devices or both if you need that, providing precise and automated temperature regulation. This temperature controller is suitable for aquarium, fish tank, greenhouse, and other scenarios requiring precise temperature control. Output power: max 10A 220Vac each.
- High-precision temperature control: The KT4000 temperature controller plug supports heating and cooling modes, and can automatically switch according to needs, making it suitable for various environments and usage scenarios. It provides high-precision temperature control, ranging from -50℃ to 99℃, ensuring temperature stability across various applications.
- Intuitive and user-friendly interface. Just using 3 buttons on this KT4000 thermostat plug to complete desired temperature setup and other parameters. It has cooling delay setting, which prevents your device from over cycling the compressor. The easy-to-read display can be sticked by velcro double-sided tapes on a prominent location, making it convenient for you to monitor the real-time temperature.
- Safe and reliable design. The fire-resistant and durable materials ensure long-term stable operation, providing safe and worry-free use. Built-in buzzer alarm function promptly alerts you to abnormal conditions, ensuring safe usage. This KT4000 thermostat plug uses a 2-meter high-precision and waterproof NTC temperature sensor to monitor environmental temperature in real-time, ensuring accurate and precise temperature control.
- More functions. The built-in memory function retains the settings in case of power outages, offering peace of mind and avoiding any potential disruptions to the temperature control system. This thermostat plug supports a temperature calibration function to ensure that the displayed temperature matches the actual temperature. The reset function allows users to swiftly restore factory settings with ease.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Package Dimensions | 23.5 x 13.2 x 6 cm; 723 g |
| Specific uses | Aquarium, Temperature Sensitive Systems |
| Batteries required | No |
| Included components | [«2-meter waterproof temperature probe, suction cup, 2 velcro double-sided tapes»] |
| Item weight | 0.72 Kilograms |

## Product Details

- **Brand:** KETOTEK
- **Model name:** KT4000
- **Controller type:** Hand Control
- **Special feature:** Waterproof
- **Colour:** Black
- **Specific uses for product:** Aquarium, Temperature Sensitive Systems
- **Temperature Control Type:** Digital
- **Connectivity technology:** Wired
- **Included components:** [«2-meter waterproof temperature probe, suction cup, 2 velcro double-sided tapes»]
- **Power source:** Corded Electric

## Images

![KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan - Image 1](https://m.media-amazon.com/images/I/51Sokd4L0jL.jpg)

## Available Options

This product comes in different **Style Name** options.

## Questions & Answers

**Q: Probably a daft question, but how do you set the current time on this?**
A: Press and hold "SET" for 3s, press "SET" several times until the lock icon flashes, press up or down key to set the hour, press "SET" again to set minute. Press and hold "SET" for 3s to save the settings.

**Q: I've lost my instructions is there anywhere I can download them?**
A: Please contact linjy@cnketotek.com for manual in PDF

**Q: I have a 80w deep heat bulb in but temp range only goes to 32 degrees  why is that?**
A: I assume you are saying the temperature achieved is only 32° , I had similar problem. First is the sensor close to the area the spot of the bulb is heating, if so ,as in my case your bulb is underpowered for the application and needs to be upgraded to a higher wattage. 
If the bulb is dimming at 32° then you either have it set wrong or it is faulty
If I have assumed wrong or misread the question please disregard this answer. I accept no liability for the health of your animal should you take any notice of what I have suggested.

**Q: for some reason the second plug makes my uvb flicker a lot and the first plug what's for heating allows the basking temp to go 5° more than it should?**
A: The flicking could be to do with the heat lamp stealing all the energy so the uvb could be getting less energy than it should. I had this problem before so now I have one light on one extension and another for the other. 
The temp rise is normal and will lower it's self automatically. Same with if it goes 5 degrees lower it will then heat itself back up. 

It took me a while to work it all out but now it does everything itself. I never have to touch it, it's amazing 😊

## Frequently Bought Together

- KETOTEK Digital Temperature Controller Thermostat Plug Socket with Waterproof Sensor, 2-Stage Thermostatic Plug 220V Heating Cooling Temperature Switch for Aquarium Greenhouse Heater Fan
- Arcadia Pro T5 UVB Kit 12% Desert

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-31*