SensEver® Hot Surface Indicators (HSI)
TEGnology self-powered, battery-free hot surface indicators enhance industrial safety with maintenance-free, real-time temperature monitoring
TEGnology SensEver HSI innovative battery-free hot surface indicators are designed to improve workspace safety and process awareness. These compact and durable devices monitor surface temperatures in real time, providing a clear visual warning whenever hot pipes or surfaces exceed safe operating limits.
Powered entirely by thermal energy harvesting, the SensEver HSI requires no batteries or wiring, offering a maintenance-free, sustainable solution for environments where audible alarms may not be effective.
Built for harsh and hard-to-reach environments, SensEver HSI operates continuously and reliably under a wide range of industrial conditions. Its self-contained design makes it ideal for use in areas lacking electrical access or requiring ATEX Zone 2 compliance.
With a service life exceeding 10 years, the SensEver HSI series exemplifies sustainable innovation, protecting personnel, reducing maintenance costs, and supporting industries in achieving their green energy and zero-CO₂ goals.
- Cable and battery-free operation powered by thermal energy harvesting
- Continuous real-time monitoring (24/7/365)
- Maintenance free
- Simple mounting
- Compact footprint (35 mm x 35 mm x 60 mm)
- Visual alarm with flashing red light (1 Hz)
- On request: adjustable alarm thresholds from +60°C to +140°C
- Long lifetime (>10 years)
- ATEX Zone 2 certified
- Waterproof
- Operates in temperatures from -20°C to +145°C
- Compatible with pipe diameters from Ø8 mm and up
- Optional adapter available for flat surfaces
- Industrial safety monitoring
- Chemical and pharmaceutical processing
- Oil and gas pipelines
- Food and beverage manufacturing
- HVAC and energy systems
- Power generation and utilities
- Industrial automation systems
- Factory and machinery safety retrofitting
- Facility management
SensEver® Hot Surface Indicators (HSI)
| Image | Manufacturer Part Number | Description | Sensor Type | Sensing Temperature - Local | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|
![]() | ![]() | SensEver HSI | pipe monitor, temperature sensor | Analog, Local | -20°C ~ 140°C | 50 - Marketplace | $265.16 | View Details |



