Free shipping on orders over $89.99 in the USA, Canada, UK. International orders over $250 also qualify for free shipping. Shop now!

DS18B20 Temperature Probe

Waterproof external temperature probe for air, liquid, and freezers/fridges, working with WS1 and WS1 Pro (Micro USB)

    $ 12.99 USD
  • Save $ 4.00 USD


- +

  • Stainless steel material
  • Suitable for extremely hot or cold environment
  • Working with WS1, WS1 Pro
  • Ready to use straight from the box

Temperature Probe DS18B20 is a waterproof external temperature probe designed to operate in extreme conditions (-55 °C to 125 °C). It works with WS1 and WS1 Pro. With IP68 and high-quality stainless steel, it can be used in liquids, freezers, fridges, cold storage, etc., and won’t get rust. The flat cable version is specially designed for freezers and fridges, and it won’t compromise the door seal.

The different cable lengths are designed to offer you maximum flexibility.

The ready-to-use Micro USB plug allows you to deploy this probe in a second.


  • Temperature measuring range: -55 °C to +125 °C (-67 °F to +257 °F), with accuracy of ±0.5 °C
  • Working with WS1 and WS1 Pro
  • The probe is made of high-quality stainless steel, for use in harsh environment
  • IP68 waterproof, can be used in liquid
  • The flat cable version is designed specifically for freezers and fridges, can pass through the door seal
  • Wide application: refrigerated trucks, pharmaceutical factory GMP monitoring system, telecom airport monitoring, beer manufacturing, smart building, warehouse management, logistics, process temperature monitoring, air conditioning, incubation, animal breeding, greenhouse, freezers, and other industries


- When working with WS1, only one DS18B20 can be connected to one WS1 at a time; When working with WS1 Pro, no more than two DS18B20 probes can be connected to one WS1 Pro at a time.

- This product is designed to work exclusively with UbiBot devices.

WS1 More details
WS1 Pro WiFi Version More details
WS1 Pro Sim Version More details

UbiBot ® offers a revolutionary way to monitor environmental conditions where they matter. The sensors synchronize data to UbiBot ® IoT Platform using WiFi, Cellular or Ethernet connection (depending on the specific model purchased). Users can then access data from anywhere via a smartphone or the Web console.


  • Data Management: Manage all your IoT data in one place; you could add as many devices as you want to one UbiBot account.

  • Unlimited Storage: Unlimited cloud-based storage ensures you will never run out of space. This allows you to view all your historical data via UbiBot App or Web.

  • Free App & Web Console: Using UbiBot App and Web Console is free. Powerful and thoughtful features provide you brilliant experience.

  • Analysis and Visualization: Use powerful analysis and visualization tools to get the most out of your data; spot trends and direct comparisons.

  • Real-Time Alerts: Fully customizable alert system will notify you via App notifications, emails, phone call/SMS, HTTP whenever any metric goes out of the range preset.

  • Highly Secure Platform: UbiBot IoT platform is designed to keep all your data secure so you never have to worry about hackers or other security issues.

  • Working with IFTTT, Alexa, Google Assistant, Google Sheet

  • Compliant with FDA CFR21


Real-time and history data

The UbiBot Platform is a cloud-based IoT platform where all measured data is uploaded and stored. UbiBot App and Web Console allow you to view current data as well as historical data in graphs. The adjustable Y-axis scale allows you to view any tiny fluctuations in the curve.

Customizable alerts and bulk operation

Setting and receiving alerts on your devices helps you to get notified of the conditions timely. When you have many devices to manage, it’s time-consuming to set each alert rule one by one. Therefore, we’ve developed a bulk operation module with which you can set the same rule for many devices at a time.

Free data export

On UbiBot Platform, you can download the history data in CSV or PDF format. The CSV file only contains raw data, while the PDF file is a summarized report with average, maximum and minimum value within the chosen period. The PDF file is much easier to read and archive.

Device sharing and bulk operation

For business users, centralized control over multiple devices is available, with no limit on the number of devices in one account. Also available are bulk operations that apply to sensor settings, alerts, and remote control routines. Devices can be shared with other people, which allows for distributed management by different colleagues.

Intelligent automation in UbiBot platform

UbiBot is committed to building intelligent industrial and home ecosystems. By integrating temperature and humidity sensors and the smart plug SP1 in one system, automated operation is achieved through data linkage. For example, fans can be switched on when the temperature rises to 30 °C.

Data forwarding

UbiBot is an open platform that provides cloud-based services while supporting customers to use their own storage servers. With the data forwarding service, you can forward the data collected by your device to your own private URL to protect privacy.

Location tracking and logging

UbiBot GS1-PL4G1RS is embedded with GNSS (Global navigation satellite system) for positioning. Through mobile data communication, real-time location information is transmitted to the platform and recorded. The UbiBot platform integrates this data, plots it into a trajectory map, and presents it.

Platform-based calibration

UbiBot platform supports data calibration both on the platform level as well as the device level. One-step calibration, instant display, no impact on historical data.

SIM card management

When using UbiBot Global SIM to transfer data, you can manage it by yourself. Unlike other SIM cards with a standard monthly fee and traffic amount, our SIM supports many types of plans. Choose the one that suits you now, and change to another next time. No arrearage and no extra charge.

Technical specifications

Temperature measuring range -55 °C to +125 °C (-67 °F to +257 °F)
Accuracy ±0.5 °C (over the range of -10 °C to +85 °C)
Connector Micro USB
Protocol Single Bus protocol
Working voltage 3-5.5 V
Power dissipation ≤0.1 W

Physical specifications

Material Stainless steel
Size of stainless steel shell 6 mm diameter x 50 mm long
Cable length 3 m, 5 m, 10 m, 15 m (Only 3 m for the flat cable version)
IP level IP68
Downloads and Documents
DS18B20 Manual Book More details
Instructions of Ubibot Probes Connection More details
Data Sheet

*Free Express Shipping on orders over $89.99 to USA, Canada and UK. For other countries, Free Worldwide Shipping applies on orders over $250. Delivery times and costs will be automatically calculated after you enter your shipping address during checkout. Orders are shipped from our closest international warehouse.
The price you pay doesn't include import duties, taxes or charges as these vary widely between countries.You are responsible for paying all such charges immediately upon the receipt of the item.

Contact our local distributors for next-day delivery. Service available for the following countries:
You can enjoy the fastest delivery service, as well as professional technical, local sales, and after-sales support.

UK Italy Romania Poland Germany Norway France Netherlands Singapore Thailand Philippines United Arab Emirates Kingdom of Saudi Arabia Malaysia America Canada Ecuador Australia Denmark Vietnam

Related to this product

TH30S-B Probe
TH30S-B Probe

High-quality RS485 external air temperature and humidity probe

Sale price $ 19.00 USD Regular price $ 22.00 USD
Save $ 3.00 USD
Sale price $ 19.00 USD Regular price $ 22.00 USD
Soil Temperature and Moisture Sensor
Soil Temperature and Moisture Sensor

Monitoring the soil temperature and moisture with an embedded RS485 communication protocol interface

Sale price $ 59.99 USD Regular price $ 69.99 USD
Save $ 10.00 USD
Sale price $ 59.99 USD Regular price $ 69.99 USD
PT 100 Industrial-grade Temperature Probe
PT 100 Industrial-grade Temperature Probe

Works in extreme conditions, with the measuring range from -200 °C to 400 °C

Sale price $ 59.99 USD Regular price $ 65.99 USD
Save $ 6.00 USD
Sale price $ 59.99 USD Regular price $ 65.99 USD
Ubibot External CO2 Probe
Ubibot External CO2 Probe

CO2 concentration measuring & monitoring 24/7 with real-time alerts

Regular price $ 68.00 USD
Regular price $ 68.00 USD
Waterproof external temperature probe for air, liquid, and freezers/fridges, working with SP1 and GS1-1DS (3.5 mm audio plug)
Sale price $ 13.49 USD Regular price $ 17.49 USD
Save $ 4.00 USD
Sale price $ 13.49 USD Regular price $ 17.49 USD