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NEON Sonic Steam Trap Monitor Ex with integrated mounting assembly
NEON Sonic Steam Trap Monitor Ex front‑mounted configuration
NEON Sonic Steam Trap Monitor Ex with separate sensor and housing
NEON Sonic STM Ex with horizontal housing and connected sensor

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.

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    Delivers continuous monitoring with instant alerts to prevent failures and reduce downtime.

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    Integrates easily with existing DCS/SCADA systems and offers up to 14 years of battery life.

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    Built for harsh environments with IECEx / ATEX Zone 0 certification for safe operation.

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.

Close-up of the NEON Sonic industrial sensor with stainless steel acoustic probe and bright green LoRaWAN-enabled housing, designed for monitoring steam traps and critical assets.

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

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LoRaWAN transmitter with acoustic and temperature Sensor

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Process temperature -40°C to 450°C

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IECEx zone 0 / ATEX zone 0 certified

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14-year battery life (depending on environment)

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Fully LoRaWAN compatible

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Based on the highest security standards

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100% ownership of data

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Integration with existing data backends or DCS

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Detailed and extensive documentation

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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.
Aerial view of a modern industrial facility at dusk

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

Asset Monitoring Software

Spot issues early with SolidRed

SolidRed software uses data from your facility’s sensors to give you clear reports and early alerts. Stay ahead of problems and keep your operations running smoothly.
Industrial tablet showcasing SolidRed analytics with dynamic green accent

Resources

Documents

file-name
IMI TWTG - NEON Sonic-Steam-Trap-Monitoring Ex Variant DatasheetNEON Sonic-Steam-Trap-Monitoring Datasheet DS-LD-SX-02-00 4000 A1.pdf

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