About US

History

Founded in 1983, Vistec has been a trusted name in gas detection solutions for over four decades. With over 40 years of industry experience, we specialize in delivering reliable, high-performance systems tailored to a wide range of environments—from compact boiler rooms to state-of-the-art clean rooms in pharmaceutical facilities.

Our expertise spans the design, installation, and maintenance of gas detection systems, whether it’s a simple single-sensor control panel or a complex, multi-zone monitoring setup. At Vistec, we’re committed to providing not only the right products for your specific needs but also the ongoing support and maintenance required to ensure your system performs at its best—safely, efficiently, and continuously.

Mission

To safeguard people, property, and the environment by delivering best-in-class gas detection solutions, integrating expert installation, calibration, and maintenance services with a commitment to sustainability and continuous improvement.

Vision

To be Ireland’s most trusted gas detection partner—leading through innovation, sustainability, and customer-centric solutions—enabling safe, compliant, and future-ready operations across all industries.

Gas Type Information

Relative Density Air = 1 - 0.55

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Methane

Relative Density Air = 1 - 1.55

Units - %LEL

Standard Range - 0-100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Propane

Relative Density Air = 1 - 0.96

Units - ppm

Standard Range - 0~200ppm

Alarm Level 1 - 20ppm

Alarm Level 2 - 100ppm

Carbon Monoxide

Relative Density Air = 1 - 1.52

Units - %Vol

Standard Range - 0~2%

Alarm Level 1 - 0.50%

Alarm Level 2 - 1.50%

Carbon Dioxide

Relative Density Air = 1 - 1.105

Units - %Vol

Standard Range - 0~25%

Alarm Level 1 - 19%

Alarm Level 2 - 17%

Over Range - 23%

Oxygen

Relative Density Air = 1 - 0.06

Units - ppm

Standard Range - 0~2000ppm

Alarm Level 1 - 250ppm

Alarm Level 2 - 500ppm

Hydrogen PPM

Relative Density Air = 1 - 0.06

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Hydrogen LEL

Relative Density Air = 1 - 1.18

Units - ppm

Standard Range - 0~50ppm

Alarm Level 1 - 5ppm

Alarm Level 2 - 10ppm

Hydrogen Sulphide

Relative Density Air = 1 - 2.11

Units - %LEL

Standard Range - 0-100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Butane

Relative Density Air = 1 - 2.41

Units - ppm

Standard Range - 0~5ppm

Alarm Level 1 - 0.3ppm

Alarm Level 2 - 0.5ppm

Chlorine

Relative Density Air = 1 - 2.26

Units - ppm

Standard Range - 0~5ppm

Alarm Level 1 - 0.5ppm

Alarm Level 2 - 1ppm

Sulphur Dioxide

Relative Density Air = 1 - 0.58

Units - ppm

Standard Range - 0~100ppm

Alarm Level 1 - 25ppm

Alarm Level 2 - 35ppm

Ammonia

Relative Density Air = 1 - 2.48

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Pentane

Relative Density Air = 1 - 1.03

Units - ppm

Standard Range - 0~10ppm

Alarm Level 1 - 2ppm

Alarm Level 2 - 3ppm

Nitric Oxide

Relative Density Air = 1 - 2.62

Units - ppm

Standard Range - 0~5ppm

Alarm Level 1 - 0.5ppm

Alarm Level 2 - 1ppm

Nitrogen Dioxide

Relative Density Air = 1 - 0.7

Units - ppm

Standard Range - 0~10ppm

Alarm Level 1 - 1.8ppm

Alarm Level 2 - 3ppm

Hydrogen Flouride

Relative Density Air = 1 - 0.93

Units - ppm

Standard Range - 0~10ppm

Alarm Level 1 - 0.9ppm

Alarm Level 2 - 4.5ppm

Hydrogen Cyanide

Relative Density Air = 1 - 1.26

Units - ppm

Standard Range - 0~10ppm

Alarm Level 1 - 1ppm

Alarm Level 2 - 5ppm

Hydrogen Chloride

Relative Density Air = 1 - 1.66

Units - ppm

Standard Range - 0~1ppm

Alarm Level 1 - 0.1ppm

Alarm Level 2 - 0.2ppm

Ozone

Relative Density Air = 1 - 1.51

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Ethanol

Relative Density Air = 1 - 1.94

Units - ppm

Standard Range - 200ppm

Alarm Level 1 - 20ppm

Alarm Level 2 - 40ppm

Iso-Butylane

Relative Density Air = 1 - 0.9

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

Acetylene

Relative Density Air = 1 - 1.55

Units - %LEL

Standard Range - 0~100%

Alarm Level 1 - 20%

Alarm Level 2 - 40%

LPG