---
product_id: 374730221
title: "ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor"
brand: "thermopro"
price: "$8.56"
currency: USD
in_stock: false
reviews_count: 5
url: https://www.desertcart.ec/products/374730221-thermopro-tx-4-with-433mhz-frequency-fitting-waterproof-transmitter-additional
store_origin: EC
region: Ecuador
---

# 433MHz universal frequency Rechargeable lithium battery tech Waterproof & weatherproof sensor ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor

**Brand:** thermopro
**Price:** $8.56
**Availability:** ❌ Out of Stock

## Summary

> 🌡️ Stay ahead of the weather curve with ThermoPro TX-4 – because your comfort deserves precision!

## Quick Answers

- **What is this?** ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor by thermopro
- **How much does it cost?** $8.56 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/374730221-thermopro-tx-4-with-433mhz-frequency-fitting-waterproof-transmitter-additional)

## Best For

- thermopro enthusiasts

## Why This Product

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

## Key Features

- • **All-Weather Durability:** Waterproof sensor built to withstand rain, snow, and extreme temps down to -31°F (-35°C).
- • **Extended Wireless Range:** Reliable transmission up to 200 feet ensures you stay connected to your environment from anywhere in your space.
- • **Multi-Location Monitoring:** Supports up to 4 remote sensors so you can track temperature and humidity across multiple zones simultaneously.
- • **Seamless 433MHz Compatibility:** Works flawlessly with all ThermoPro 433MHz indoor/outdoor thermometers for effortless integration.
- • **Eco-Friendly Rechargeable Power:** Includes a rechargeable lithium battery and charging cable for sustainable, hassle-free operation.

## Overview

The ThermoPro TX-4 is a universal 433MHz outdoor sensor designed to enhance your ThermoPro indoor/outdoor thermometer system. Featuring a waterproof, rechargeable lithium battery-powered sensor, it delivers accurate temperature and humidity readings from up to 200 feet away. Compatible with multiple ThermoPro models, it supports monitoring in up to 4 locations, making it ideal for professionals who demand reliable environmental data in any weather.

## Description

ThermoPro – Life Like A Pro!Equipped with a professional grade indoor/outdoor sensors, ThermoPro outdoor sensor features powerful wireless technology, a rainproof & rechargeable design and an integrated hanger for easy mounting. No matter you’re concerned about keeping your greenhouse suitable for plants, or just plain comfort, ThermoPro TX-4 transmitter tells you what you need to know about the outdoor temperature. Specifications: 1. 433 Mhz transmission frequency. 2. Transmission range up to 200 ft. (range maybe reduced based on interference present). 3. Universal Transmitter for TP60S/TP62/TP65 Series Indoor Outdoor Thermometer.  Package Content: - Remote Sensor *1 - Charging Cable *1  NOTE:  The remote unit should NOT be placed under the direct sunlight, it will heat up the remote sensor which leads to higher temperature reading than the air temperature which is supposed to be measured.The remote sensor must be always placed upwards so that rain won't get inside the sensor through the vent holes on the bottom of the senor, which functions to let the remote sensor detect the environmental temperature more precisely and quickly. Synchronize Remote Sensors 1.Place the remote sensor near the base station. 2.Install batteries into the base station and the RF signal icon on the base station will flash. 3.Select the channel, press and hold the ON/OFF button on the back of the remote sensor for 2 seconds. 4.The remote sensor temperature/humidity will appear on the base station.

## Features

- Universal 433MHz outdoor sensor is compatible with all 433MHz ThermoPro indoor outdoor thermometer hygrometers; Accessory only, can not be used alone(Before purchasing a new transmitter, please confirm the model and frequency of the transmitter you already own.)
- With rechargeable lithium battery technology to monitor humidity and temperature as low as -31°F/-35°C, assuring transmission in snow; Charging cable included
- Sealed waterproof outdoor sensor assuring transmission in rain; With additional remote sensors, track environmental conditions in 4 locations at most; Tabletop or wall-mountable design
- Using a 433MHZ signal, the additional remote sensor transmits temperature and humidity readings for ThermoPro indoor outdoor thermometer up to 200 feet/60m range; Temperature accuracy: ±2°F,Humidity accuracy: ±2~3%RH
- Temperature range: -31 to 158°F (-35 to 70°C) ; Humidity range: 10% to 99% RH

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Package Dimensions | 9.3 x 8.1 x 3.3 cm; 109 g |
| Part number | TX-4 |
| Material type | Lithium |
| Power source type | Lithium Battery |
| Manufacturer | ThermoPro |
| Item model number | 12907 |
| ASIN | B07M6SCWZR |

## Product Details

- **Brand:** ThermoPro
- **Special features:** Waterproof
- **Colour:** 433 MHZ
- **Age range (description):** Adult
- **Included components:** Battery

## Images

![ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor - Image 1](https://m.media-amazon.com/images/I/61SuYffyLyL.jpg)
![ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor - Image 2](https://m.media-amazon.com/images/I/81brJ2iL7jL.jpg)
![ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor - Image 3](https://m.media-amazon.com/images/I/61r9gPI+JDL.jpg)
![ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor - Image 4](https://m.media-amazon.com/images/I/41lLHx5rt0L.jpg)
![ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor - Image 5](https://m.media-amazon.com/images/I/41J6JMrC4GL.jpg)

## Questions & Answers

**Q: Is the rechargeable battery user replaceable?**
A: It should be; I've not had to replace mine yet, so I have not opened the sensors.

You'll need to remove the screws to open the body and then see what battery is being used.

If the battery leads are soldered to the battery, then you might want to find a friend who works with electronics.

 It's not hard but most people don't have a soldering iron at home or work.

Small wire requires small solder wire. Flux/rosin is useful. A small thick paint brush for cleaning of residual flux is recommended for prolonging battery life by protecting from corrosion due to flux left on the battery terminals.

Flux - is contained in the solder wire but additional DROP of flux/rosin is useful because that is what carries and generates the heat transfer.

With soldering, you want quick heat and a small amount of solder.

Too much heat for too long will melt plastic, parts, components and the insulation of the wire (unless it's Teflon, and I'm pretty sure they probably don't use that because it's more expensive).

If you're planning to replace with a new purchase, then you have nothing to lose by practicing on the existing sensor first.

If you succeed, then you have an extra sensor handy and can replace batteries on anything in the future.

I learned to solder at NASA. We build our own rockets, payloads and battery packs from the bottom up... so it eventually hit me that I'm more than qualified to replace batteries, upgrade batteries, or even build new battery packs for my tools.

Everything works just fine. 😊

Don't be intimidated by any project, especially if you're about to throw something, that is NOT biodegradable, into a landfill, anyway. It's worth trying to learn on; if not for yourself, then for your children OR your local high school OR community college.

Technical schools and electronic engineering courses rarely have such simple projects available, yet I can promise you that these would be a worthwhile training tool for students.

That being said, do NOT bother saving clearly dead TVs, etc because the cost of diagnosing the problem will cost more than the repairs, which will cost more than a new TV.

(Samsung TVs that work fine until their screen fails to come on, but you can still hear the audio, is an example of a rare exception to that statement; they have a history of poor capacitors, which can easily be replaced for pennies in parts.)

**Q: Charging tHow long to charge and when is it fully chargedhe remote sensor**
A: Charging takes just a few hours in my experience. The light on the device turns green when the charging is complete.

**Q: Does tx-4 work on the tp-65a?**
A: Yes, it is the remove sensor recommended by the manufacturer.

**Q: I want to use this in my crawlspace. Can I leave it plugged in? I don't want to keep crawling under the house to change batteries.**
A: To be honest, I do not see why not, the only issue might be the wall plug adapter might not like being in the heat of the attic, since it is a mini voltage step down transformer they do have issues with high heat environments. That being said if you can find a longer cable for charging it might work for you. You might see if you can ask the manufacturer of the unit for guidance.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Great customer service
  

*by D***S on Reviewed in the United States on 15 October 2022*

I originally received a faulty unit. I wrote a review about it not working. The seller sent a message that they were replacing it ! I received the replacement a couple of days later! It works great! Pretty darn good customer service!

### ⭐⭐⭐⭐ 







  
  
    Good product
  

*by P***L on Reviewed in Canada on 8 April 2022*

Have been using my original transmitter and am very happy with it. I bought a second one to have two units to compare the front and back of my property. The reason I gave it 4 stars is that I’m having problems getting both to work at the same time.

### ⭐⭐⭐⭐⭐ 







  
  
    I use it to monitor the temp in baby's room
  

*by E***E on Reviewed in the United States on 28 May 2020*

I purchased this remote transponder to add to what I already have. I have a little girl and wanted to monitor the temperature in her room when she is sleeping at night. I already had the receiver which has a nice screen and yellow light for viewing at night time. This remote transponder works great. It paired up easily.  FYI: if you have more than one remote transponder, you have to remove the pannel on the back and select which channel you want to use. My receiver will accept a total of 3 channels, but you have to individually tell each remote transponder what channel it is going to be. I had to call  Thermo Pro customer service to find that out, and it was such an easy fix. On a side note, Thermo Pro customer service was quick and very friendly.

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**Shop now:** [https://www.desertcart.ec/products/374730221-thermopro-tx-4-with-433mhz-frequency-fitting-waterproof-transmitter-additional](https://www.desertcart.ec/products/374730221-thermopro-tx-4-with-433mhz-frequency-fitting-waterproof-transmitter-additional)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-06*