Line-of-Sight / Open-Path Gas Detection
Open-path gas detectors require more than a basic bump test. TriNova services LOS and open-path devices through alignment, configuration, commissioning, optics inspection, signal strength review, beam-path verification, and gas lens or gas cell challenge testing.
How TriNova performs LOS / Open-Path Gas Detection Service
Our specialists work through the aspects of LOS and open-path performance that general gas-detection service can't cover — beam alignment across the transmitter and receiver, optics inspection, signal strength review, path integrity along the full beam length, application-specific configuration, commissioning of new or realigned installations, and gas lens or gas cell challenge testing to bump the beam and confirm the expected response.
The result is open-path detection that's aligned, verified along the full path, configured correctly for the gas and the application, and confirmed responsive — with the documented service record your safety, maintenance, and reliability programs all depend on.
- LOS / open-path detector alignment across the transmitter and receiver
- Optics inspection and signal strength review
- Beam-path integrity verification along the full path (obstructions, drift, environmental exposure)
- Device configuration verified against the target gas, path length, and application
- Commissioning of new open-path installations, realignments, and major modifications
The Outcome
What LOS / Open-Path Service delivers
Beam alignment restored and verified
Line-of-sight and open-path devices drift over time — structural movement, thermal cycles, vibration, environmental exposure, or nearby work all shift the beam. Alignment service restores the transmitter-to-receiver path and documents the setpoint so future drift is detectable.
Path integrity confirmed along the full beam
The beam has to travel from the transmitter to the receiver without obstruction, attenuation, or interference along the entire path. Path integrity verification catches new obstructions, changes in the process environment, and factors that degrade detection response over time.
Response verified with gas lens or gas cell challenge testing
Open-path detection can't be bumped with a hand-held gas can the way a fixed-point sensor can. Gas lens and gas cell challenge testing is the proper method — the beam gets a controlled gas challenge and the device response is confirmed in the same way it would respond to a real release.
A documented LOS service record
You receive a documented record covering alignment readings, path verification results, configuration state, and challenge-test response — built to support your maintenance program, compliance documentation, and any audit or safety review that follows.
When to schedule LOS / open-path service
Common reasons facilities request LOS / Open-Path Gas Detection Service
- Suspected beam misalignment, intermittent detection, or path faults on installed open-path devices
- Structural, environmental, or process changes potentially affecting beam path integrity
- New open-path installation requiring commissioning, alignment setup, and initial response verification
- Scheduled LOS service to verify alignment, path integrity, and response between reliability cycles
- Recurring nuisance alarms or lost-beam faults on installed LOS/open-path assets
LOS / Open-Path Service FAQs
What is the difference between point gas detection and open-path gas detection? Point gas detection measures at a single sensor location — the gas has to reach the detector for the response to fire. Open-path detection measures across a beam path (often meters long) between a transmitter and receiver, so it monitors a line across the process rather than a point. Open-path is typically used for wide-area coverage or where a single-point sensor can't be practically placed in the release path.
Can TriNova bump test open-path gas detectors? Yes — using gas lenses or gas cells. Hand-held calibration gas at one end of the beam doesn't produce a meaningful response on an open-path device. A gas lens or gas cell introduces a controlled gas volume into the beam path and produces the response the device would generate for a real release — the proper challenge test method for LOS/open-path.
Why does LOS gas detection need alignment? The transmitter and receiver must remain optically aligned along the beam path for the device to measure correctly. Structural movement, thermal cycles, vibration, environmental exposure, and nearby work all cause drift — and when the beam moves off-axis, signal strength drops and detection degrades. Alignment service restores the path and documents the setpoint so future drift is detectable.