Ref: PMIOT-FISSUR

Autonomous IoT connected crack meter - Remote crack monitoring

Displacement sensor:

Type: linear potentiometric
Measuring range: from 0-10 mm to 0-300 mm (widest on the market)
Non-linearity: 0.25%
Resolution: 16 bits
Mounting: 2 articulated M5 ball joints (±20°)
Protection: IP65
Operating temperature: -30 °C to +100 °C

Data transmission:

Connectivity: NB-IoT + 4G (dual channel) — no router or gateway required
Protocol: secure MQTT
Power supply: rechargeable Li-ion battery — up to 12 months battery life
Option: photovoltaic solar panel (sites without power access)
Local storage: 32 GB microSD card (full backup in case of network loss)
Number of channels: 1 channel (4 or 6 channels available)
Converter: 16 bits
Enclosure: waterproof IP66 aluminum
Operating temperature: -20 °C to +50 °C
Dimensions: 155 × 120 × 55 mm
Measurement frequency: remotely configurable

2 to 8 weeks

Overview

The PMIOT-FISSUR is an autonomous IoT crack meter designed for continuous and remote monitoring of cracks in civil engineering structures, buildings, bridges, historical monuments and industrial infrastructure.

The sensor and its transmission module form an integrated turnkey kit: a single installation, data accessible immediately, without network wiring or local infrastructure.

Thanks to dual-channel NB-IoT connectivity, the system guarantees transmission continuity even in areas with variable coverage. Each measurement is transmitted via the secure MQTT protocol to your Cloud platform (PM Instrumentation or third-party) and simultaneously backed up on a 32 GB microSD card for total redundancy.

Data transmission:

The module The connected datalogger - PMIOT-STAND ensures automatic transmission of measurements to a remote server via NB-IoT or 4G networks, integrated with dual connectivity to guarantee communication continuity, even in areas with variable coverage. Data is sent using the MQTT protocol, ensuring reliable, secure and energy-efficient transmission, compatible with the PM Instrumentation Cloud platform or third-party platforms.

Each record is also backed up locally on a microSD card (32 GB) to ensure complete redundancy in case of temporary network loss. This dual architecture: local storage + cellular communication, enables real-time monitoring and simple integration into any connected structural or geotechnical monitoring system.

Applications - Connected structural and geotechnical monitoring

Monitoring of engineering structures and bridges: Continuous monitoring of crack evolution on bridge decks, piers and abutments. Early detection of differential movements to anticipate maintenance operations.
Diagnosis of buildings and historical monuments: Non-intrusive instrumentation for monitoring cracks in facades, load-bearing walls and ancient masonry structures. Ideal for building experts and Architects of the Buildings of France.
Construction sites and nearby works: Real-time monitoring of neighboring structures during earthworks, demolition or underground works. Threshold-configurable alarm triggering.
Industrial and energy infrastructure: Monitoring of silos, tanks, railway infrastructure, offshore platforms and energy production structures in remote areas.

FAQ

What is the battery life of the PMIOT-FISSUR crack meter? The battery life is 12 months with the internal rechargeable battery, depending on the configured measurement frequency. A solar panel option allows unlimited battery life on exposed sites.
Is network infrastructure required on site? No. The system communicates directly via NB-IoT and 4G cellular networks. No router, LoRa gateway or local infrastructure is required.
What is the maximum measuring range? The potentiometric displacement sensor covers a range from 0-10 mm to 0-300 mm depending on the chosen configuration, making it suitable for both micro-cracks and significant structural movements.
Is the system compatible with a third-party Cloud platform? Yes. Data is transmitted using the standard MQTT protocol, compatible with the PM Instrumentation platform or any third-party supervision system (SCADA, BMS, geotechnical monitoring platforms).

: Displacement & Crack
Application: Civil Engineering, Building, Bridge, Process