Hydrogen cyanide gas sensor ES1-HCN-5

HCNelectrochemicalppm level

Product Overview
The EC Sense ES1-HCN-5 Hydrogen Cyanide (HCN) gas sensor is a compact solid polymer electrochemical sensor engineered to detect HCN in the 0 – 5 ppm range. It offers long lifetime, no power consumption and simplified integration when combined with the EC Sense Smart Digital Board, reducing the need for manual sensor calibration.

Understanding the technology behind it
Solid polymer electrochemical technology uses electrochemical catalytic reactions to generate an electrical signal proportional to gas concentration. Unlike liquid- or gel-based electrochemical sensors, the solid polymer core prevents leakage and drying, increasing reliability for industrial deployments.

The inner workings of the technology
EC Sense solid polymer sensors incorporate three electrodes in contact with a solid electrolyte. Electrodes feature large precious-metal surfaces. As HCN diffuses through the porous membrane to the working electrode, it is oxidized or reduced and the resulting current is measured across the external circuit.

What sets EC Sense ES1 Gas Sensors apart?
These sensors are designed for automated mass production with consistent quality control. The solid-core design eliminates leakage and drying issues, they are compact for easy PCB integration, and they provide stable long-term operation suitable for continuous monitoring.

FEATURES

• High selectivity for targeted gases
• Long lifetime > 3 years
• No-poisoning
• Typical warm-up time in seconds
• Fast response time
• No power consumption
• Linear output
• No zero line drift
• Improved signal-to-noise ratio
• Wide operating temperature range: -40°C to +45°C
• Excellent sensitivity at low temperatures
• No leakage
• Small size
• RoHS compliant

SPECIFICATIONS
Technical Parameters

• Measurement Range: 0 – 5 ppm
• Resolution: < 0.1 ppm
• Maximum Overload: 100 ppm
• Sensitivity: 40 nA/ppm ± 15 nA/ppm
• Response Time: T50 < 30 sec. / T90 < 120 sec.
• Weight: < 0.7 g
• Dimensions (sensor): 11.5 x 11.5 x 5.5 mm (without pins)

Warranty
1-year warranty (manufacturer statement).

APPLICATIONS
No information yet.

DOCUMENTS
Datasheet available: ES1-HCN-5-01 Hydrogen Cyanide Sensor_Datasheet_V1.0_20260325

Technical characteristics / specifications

• Model: ES1-HCN-5
• Brand: EC Sense
• Measurement Range: 0 – 5 ppm
• Resolution: < 0.1 ppm
• Maximum Overload: 100 ppm
• Sensitivity: 40 nA/ppm ± 15 nA/ppm
• Response Time: T50 < 30 sec. / T90 < 120 sec.
• Weight: < 0.7 g
• Dimensions (sensor): 11.5 x 11.5 x 5.5 mm (without pins)
• Operating Temperature Range: -40°C to +45°C
• Lifetime: > 3 years
• No power consumption
• RoHS compliant