Wireless Temperature Sensor - Wireless Temperature Monitoring

XS550 Wireless Temperature Monitoring Module

Increase field productivity with the versatile and convenient XS550 wireless industrial temperature sensor.

Designed to withstand even the harshest of environments, this waterproof, dustproof, and explosion-proof WiFi temperature transmitter is ready to go where you need it most. It can quickly and reliably communicate across distances of up to 6 miles/10 km, conveniently connecting users via a simple and intuitive smartphone Near Field Communication (NFC) interface, and its streamlined design simplifies maintenance, allowing users to easily replace the long-lasting battery without removing the measurement module from the piping.

•    Supports hazard location installation
•    WiFi temperature sensor ideal for hazardous locations
•    Battery life of up to 10 years
•    Easily monitor sensor status from a smartphone.

Benefits of Wireless Industrial Temperature Sensors

The sensor supports 2 inputs of IEC standard thermocouples (any of 9 types including Type B, E, J).


Yokogawa Sushi Sensor - Wireless Temperature MonitoringHazardous Location Installation

The XS550 in combination with the XS110A can be installed in Zone 1 areas, such as petrochemical plants, paint plants, steel plants, where flammable gas or vapor may exist.

Long-Distance Communication

LoRaWAN has excellent sensitivity reception, good radio interference resistance, and offers a communication distance of six miles (10 km) or more in ideal conditions. This sensor can be installed anywhere need - over a vast area.

Modular Design

The design simplifies maintenance. Easily replaces the battery without removing the XS550 Temperature Measurement Module from the piping.

Excellent Environmental Resistance and Battery Powered

The XS110A supplies power to the XS550 via a built-in replaceable battery that can last up to 10 years. This waterproof, dust-proof, and explosion-proof wireless pressure monitor can operate in harsh environments can be installed anywhere in a plant (no power cables required).

Configure and Monitoring Sensor Status from a Smartphone

Using an Android-based smartphone with a Near Field Communication (NFC) interface makes the configuration and status monitoring of sensors simple and intuitive.


XS110A Wireless Communication Module

WIRELESS SPECIFICATIONS Communication Protocol LoRaWAN Class A EU868, AS923, US915
Data Rate 250 to 11000 bps*1
Frequency Available frequency bands vary depending on the country.
Please check General Specifications for details.
Radio Security AES 128-bit encryption
RF Transmitter Power Max. 7 dBm
Antenna Built-in Omni-directional antenna
POWER SUPPLY SPECIFICATIONS Battery Lithium thionyl chloride battery (size D): 1 unit
Rated voltage: 3.6 V
Rated capacity: 19 Ah
PERFORMANCE SPECIFICATION Update Time 1 minute to 3 days
NFC Interface NFC Forum Type 2 Tag
INSTALLATION ENVIRONMENT Ambient Temperature Limits Operating: –40 to 85 °C (–40 to 185°F)
Storage: –40 to 85 °C (–40 to 185°F)
REGULATORY COMPLIANCE STATEMENTS Degrees of Protection IP66/IP67 and Type 4X
Apply when connected to the Measurement Module.
Explosion-proof ATEX, IECEx, FM
Weight 300 g (0.66 lb)*3

*1: Available data rates vary depending on the country.
*2: For detail on the channel plan, refer to General Specifications.
*3: Without battery


XS550 Temperature Measurement Module

MEASUREMENT RANGE Temperature Refer General Specifications, Table 1 for measurement range.
PERFORMANCE SPECIFICATIONS Measurement Accuracy Refer General Specifications, Table 1 for measurement accuracy.
Update Time 1 minute to 3 days
Battery Characteristics Battery life is 10 years under the following conditions.*1
• Ambient temperature: 23 ± 2°C
• Update Time: 1 hour
FUNCTIONAL SPECIFICATION Input Input number and type: 2, non-insulated
Thermocouples: B, E, J, K, N, R, S, T, C
INSTALLATION ENVIRONMENT Ambient Temperature Limits Operating: –40 to 85°C (–40 to 185°F)
Storage: –40 to 85°C (–40 to 185°F)
REGULATORY COMPLIANCE STATEMENTS Degrees of Protection IP66/IP67 and Type 4X
Apply when connected to the XS110A.
Explosionproof ATEX, IECEx, FM
PHYSICAL SPECIFICATIONS Housing Material Stainless Steel
Weight 400 g (0.88 lb)

*1: Environmental conditions such as vibration may affect the battery life.


Sushi Sensor App

This software is used to perform the setting and status check of this product via the NFC interface.

Get it on Google Play
Operating Environment Item Recommended System Requirements
OS Android 5.1.1 or higher
CPU Snapdragon 800 or better
Resolution 1280 x 720 dots or more
NFC Readers, Writer
GPS Optional

What is a Wireless Temperature Sensor?

A wireless temp sensor works within a wireless temperature monitoring system to measure the surrounding temperature and periodically transmit the results wirelessly. 

Applications of Wireless Temperature and Humidity Sensors

  • Identifying the failed stage in multistage heat exchangers
  • Monitoring energy loss due to steam leakage
  • Temperature monitoring of tanks and firebricks



Maintaining the reliable performance of a furnace fan allows operators to avoid wasting large batches, which sometimes require days of heat-treat processing.


Yokogawa’s Sushi temperature sensor is a cost-effective, reliable, long-range wireless communication for monitoring and recording to boost reliability, and also able to configure the network with redundant gateways for chemical manufacturers.


Automated wireless temperature monitoring at cement plants, lime kilns, and asphalt plants prevents expensive chute clogging issues.

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Wireless sensors and the network can reduce expenses




The measurement, collection and utilization of equipment data by the Industrial IoT (IIoT) wireless solution “Sushi Sensor” contributes to efficient equipment maintenance and open a new road to a Smart Factory.

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