Gas sensor

A passive chemiresistive gas sensor in a standard SMD footprint — detecting hydrogen and other reducing gases without a heater. Designed from the ground up for distributed deployment at scale.

Form factor	1206 SMD — 3.2 × 1.6 mm. Mounts on standard or flex PCB.
Power	Resistive read in milliseconds. Multiple parallel sensors, small battery, years of operation.
Sensing principle	Passive chemiresistive — no heater required
Target gases	H₂, CO, alcohol vapor, spoilage gases, and other reducing gases
H₂ range	~500 ppm to 3% — well below the 4% lower explosive limit
Response	Seconds-scale. Strong signal to presence and concentration change.
Temperature	−15°C to 60°C
Humidity	0–100% RH, non-condensing
Lifetime	Years, condition-dependent. No drift observed across 9+ months continuous monitoring.
Substrate	Standard FR-4, Kapton flex, ceramic
Manufacturing	Printed PCB-panel process — low-cost, high-volume pathway
Calibration	High signal, low part-to-part variation — no individual calibration required
Interface	Simple resistive

What to expect

Strong indicative signals

Validated for H₂ in the LEL range (below 4%). Reliable, repeatable response to gas presence and concentration change. Not a certified safety instrument.

Detects dangerous gases simultaneously

Responds to H₂, CO, alcohols, and other reducing gases at the same time — useful where detecting any of several dangerous gases matters.

Cannot distinguish between gases

The sensor responds to reducing gases but cannot identify which specific gas is present.

Prototype stage

We are actively seeking pilot applications and co-development partners. See our validation data and target applications.

Flex substrate — fits any surface

The sensor mounts directly on Kapton flex PCB, conforming to pipes, curved housings, and irregular surfaces. Raw measurement electronics — integration and environmental protection are application-dependent.

Kapton flex sensor strip wrapped around a pipe

8-sensor Kapton flex strip installed on pipe — sensors visible at centre of each wrap.

Sensor form factors for prototype evaluations

🔲

1206 SMD components

Individual sensors in standard 1206 SMD footprint. Drop-in compatible with standard PCB assembly. Suitable for custom board integration.

Available for evaluation

📏

8-sensor Kapton flex strip

8 sensors on a flexible Kapton substrate. Wraps around pipes, conforms to curved surfaces, fits inside packaging. Ready-to-integrate form factor for evaluation.

Available for evaluation

⚙️

Custom configurations

Application-specific sensor layouts, substrates, or integration designs. We work with partners to develop configurations suited to specific deployment requirements.

Discuss with us