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IMI TWTG
NEON Sonic for Steam Trap Monitoring (Ex)
NEON Sonic is a LoRaWAN-enabled sensor that provides real-time acoustic and temperature monitoring for steam traps and critical assets.
Delivers continuous monitoring with instant alerts to prevent failures and reduce downtime.
Integrates easily with existing DCS/SCADA systems and offers up to 14 years of battery life.
Built for harsh environments with IECEx / ATEX Zone 0 certification for safe operation.
Features
Industrial operations often rely on steam flow systems that power production, heating, and energy transfer across critical processes.
Yet, these systems often operate with limited visibility. Undetected inefficiencies, leaks, and failures in components such as steam traps can lead to significant energy losses, safety risks, and costly unplanned downtime. The digital transformation of industrial assets is changing that. The NEON Sonic extends this transformation to critical flow components in steam systems. It delivers near real-time monitoring and diagnostics for assets that previously remained unmonitored, helping facilities reduce emissions, prevent failures, and ensure compliance while keeping operations running safely and efficiently.

NEON Sonic: A LoRaWAN-enabled sensor delivering acoustic and temperature monitoring for steam systems in heavy industry.
NEON Sonic offers a cutting-edge LoRaWAN-enabled solution that combines acoustic and temperature sensing in a single probe, providing continuous, reliable monitoring of steam traps.
The sensor measures Sound Pressure Level (SPL), Temperature, and Ambient Temperature, providing continuous, reliable monitoring of steam traps and critical assets. NEON Sonic sends alerts to maintenance engineers, as soon as their assets start to fail. With fail alerts, seamless integration into existing DCS/SCADA systems, and backed by proven IoT technology, NEON Sonic ensures efficient maintenance and reduced energy losses. Its robust design delivers up to 14 years of battery life, making it a low-maintenance choice for long-term industrial deployment. All in the reliable NEON form factor that comes as a battery-powered I-IoT device, communicating wirelessly via LoRaWAN, with the option for an IECEx / ATEX Zone 0 certification, if required or wanted.
IECEx / ATEX Zone 0 certified
Designed for industry from the very beginning, IMI’s NEON product line is built to not only operate in industrial sites where explosive gases are being handled but also all other elements that a sensor may be exposed to in the course of its > 14 years lifetime (at 25°C). It has been tested and certified to work in conditions from -40° to 450° Celsius without hampering performance. The devices are designed and engineered in such a way that they can be safely and securely deployed in a wireless network and are remotely configurable, ensuring not only longevity but also reliability within an operation. Additionally, IMI delivers spare parts and product lifecycle support. It has an extremely long lifetime and therefore, the sensor can continue to be used with the correct refurbishment kit. This way, periodical maintenance can be kept at a minimum. NEON Sonic can be installed / mounted using a pipe clamp.
NEON Product Line – LoRa devices designed for heavy industry
The NEON product range supports all industrial customers moving towards LoRaWAN as the Industrial IoT network of the future. The LoRaWAN network gives industrial operations a secure solution, which has no vendor lock-in, scales up to tens of thousands of sensors, covers complete sites with only a small amount of gateways, and best of all – the low-power approach means that the lifetime of NEON products can be extended dramatically. This international networking technology is quickly becoming the industry standard. NEON stands for a standardised approach to collecting data points from within the operation and a general approach to creating integrated solutions with existing IT ecosystems.
Key features
LoRaWAN transmitter with acoustic and temperature Sensor
Process temperature -40°C to 450°C
IECEx zone 0 / ATEX zone 0 certified
14-year battery life (depending on environment)
Fully LoRaWAN compatible
Based on the highest security standards
100% ownership of data
Integration with existing data backends or DCS
Detailed and extensive documentation
Easy LoRa configuration
Range
Measuring range: 15 kHz to 85 kHz
SPL
Measures sound pressure level
Zone 0
ATEX / IECEx Zone 0 certified
Case Study
The impact of NEON Sonic on steam trap reliability
NEON Sonic’s continuous ultrasonic and temperature monitoring has helped a major industrial site boost reliability, cut energy loss, and achieve sustainability targets. Real-world deployment shows measurable improvements in maintenance efficiency and operational safety.
Specifications
Protocol
LoRaWAN (private LoRaWAN)
LoRaWAN Region
EU868 / US915 / AU915 / AS923-1 / AS923-2 / AS923-3 / AS923-4 / IN865
LoRaWAN Frequency Bands
869 MHz
915 MHz
923 MHz
Maximum RF output power
+14 dBm
Battery Rated Capacity (Ah)
17
Battery Life
14 years at 25°C (77°F) (Depending on environment)
Operating Temperature Range (Transmitter)
-40°C to 70°C (-40°F to 176°F)
Water and Dust Resistance
IP65
NEON Sonic STM firmware features
Independent event-based message triggers: Timer / Button press / Steam trap condition alert
Adjustable measurement interval: Flexible 1-minute resolution (relative or absolute)
Adjustable measurement message send condition: Always / on condition
Time synchronisation: Multiple sensors / Accuracy 12mSec
Steam trap fault indicator: Edge Intelligence spectral analysis for blocked trap and leaking trap
Firmware update over air: LoRa Alliance specifications / TS006-1.0.0 / TS005-2.0.0 / TS004-2.0.0
NEON Sonic STM measuring range
15 kHz to 85 kHz (3 dB points)
NEON Sonic sensor acoustic overload point
130 dBSPL
NEON Sonic STM temperature range
Sensor: –40 °C to 260 °C (–40 °F to 500 °F)
Sensor + Extension: –40 °C to 450 °C (–40 °F to 842 °F)
Ambient: –40 °C to 70 °C (–40 °F to 158 °F)
Certifications
ATEX / IECEx Rating: Ex II 1G Ex ia IIC T4 Ga
ATEX / IECEx Certificates: 22ATEX0004X / DEK22.0004X
cFMus Rating (pending): IS Class I Division 1 Group ABCD T4; Class I Zone 0 AEX/Ex ia IIC T4 Ga
cFMus Certificates (pending): FM22US0061X / FM22CA0043X
Resources
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