LCTR 903 | Lowcost Gas Transmitter

Product catalog summary

Introduction
The document provides technical specifications and application details for the ADOS LCTR 903, a low-cost gas transmitter designed for detecting combustible gases in various environments.

Applications
The LCTR 903 is suitable for use in gas-fired boiler systems, gas distribution and transfer stations, and battery-charging stations. It is designed to detect gases such as hydrogen, methane, and propane/butane in the Lower Explosive Limit (LEL) region.

Sensor Technology

TGS Sensor: Utilizes a semiconductor sensor constructed on SnO2-sintered N-substrate. It measures gas concentration through changes in conductivity when gases are absorbed.
VQ Sensor: Operates on the principle of heat reaction, using catalytic combustion to measure gas components through resistance changes in the measuring element.

Technical Specifications

Measurement Method: TGS uses semiconductor technology, while VQ uses heat reduction.
Measurement Range: 0 – 100% LEL for both sensors.
Percentage Error: ±5% of full-scale deflection (f.s.d.) for both sensors.
Linearity: TGS: <15% of f.s.d., VQ: <3% of f.s.d.
Temperature Range: -20°C to +45°C for both sensors.
Response Time (t90): Approximately 20 seconds for both sensors.
Supply Voltage: 15 V – 30 V for both sensors.
Interface: 4 – 20 mA three-wire for both sensors.
Protection Class: IP 54 for both sensors.
Dimensions: 80 x 80 mm (Diameter x Height) for both sensors.
Weight: 500 g for both sensors.

Conclusion
The ADOS LCTR 903 is a versatile and reliable gas transmitter suitable for detecting a range of combustible gases in various industrial applications, with robust technical specifications ensuring accurate and efficient performance.

Catalog excerpts

ADOS GmbHInstrumentation and Control P.O. Box 500 444 52088 Aachen ׷ FRG Trierer Strasse 23-25 52078 Aachen ׷ FRGTel: +49 (0)2 41 / 97 69 - 0Fax: +49 (0)2 41 / 97 69 - 16 eMail: [email protected] www.ados.de >

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