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Fixed Gas Detector

Fixed Gas Detector


With over 400 hazardous gases and vapours monitored, The Tocsin 750 Series addressable gas detectors provide a flexible future proof system for your gas detection requirements.

With 2-Wire Addressable Control Panels protocol allows the 750 series to communicate over the detector power cables. In addition to this there is no specific polarity for cable connections, meaning which dramatically speeds up installs and reduces human errors when cabling. This is because you do not have to think about the wiring and terminations.

Each 750 Series Gas Detectors has multiple input and output options, as well as being a gas detector. This makes adding signalling or control functions to the system very simple. Cable a beacon sounder to the nearest available detector or add control for a solenoid valve. Not to mention you can control a range of third party devices of one detector node.

Use the additional ports on the detectors to read in other analogue 4-20mA signals, pressure, flow, temperature. If its a 4-20mA signal then you can read it into the detector and then set alarms against it in just the same way as the gas detectors. In addition two controller versions are available with a comprehensive range of interfaces.

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The iTrans 2 fixed gas detector makes use of an intelligent electronics platform that offers one or two points of detection from a single head for maximum flexibility, superior performance and lower installation costs. With the optional HART Communication Protocol, the iTrans2 offers remote diagnostics, set-up or calibration by superimposing a high-frequency current across the industry standard 4-20mA analog line.

The Oldham iTrans 2 can simultaneously monitor two gases with both readings shown on a dual-channel split-screen LED display. Two integral or remote sensors can be fitted. Single sensor operation is also possible. Offering flexibility and limiting installation costs by reducing the number of transmitters required.

It can detect any gas combination for a specific environment and it makes use of the company-proven smart infrared gas sensor technology and safety features including automatic sensor recognition, access code security, and zero and cal fault protection that are all enclosed within an explosion-proof aluminum or stainless steel housing.

  • Housing as standard Epoxy Coated Aluminium, optional 316
  • Stainless Steel for corrosive environments
  • Display visible in dark places
  • Explosion-proof
  • Supplied Voltage 24V DC (operating range 12-28v dc)
  • Cable 3-wire or 4-wir
  • Operating temperature -40°C to +75°C
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The OLC100/OLCT 100 range of fixed detectors has been designed for detection of combustible gases, toxic gases or oxygen. Available in explosion-proof or intrinsically safe versions, the OLCT 100 is suitable for detection of all gases in ATEX zones.

the OLC100/OLCT 100 offers an infrared sensor, which allows it to be used in more severe environmental conditions, where the presence of poisons could harm the use of a catalytic sensor. With this new line of detectors, Oldham broadens its product range with products that combine reliability, durability and ease of use.

  • 4-20 mA analog transmitter without display;
  • SIL2 capability for LEL, O2, CO, H2S, NH3, CO2;
  • Detects combustible, toxic or refrigerant gases and O2;
  • Available with electrochemical, infrared or semi-conductor sensors;
  • Designed for industrial applications;
  • Available in explosion-proof or intrinsically safe versions, and stainless steel;
  • A high-temperature version allows operation up to 200 °C.
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Designed for commercial applications, OLCT 10 detector perfectly
suit the protection of equipment and personnel in presence of
combustion and exhaust gases or refrigerants (freons) in ambient

Rugged, small, easy to install and operate, these detectors
combined with the MX 15 or other control unit meet demanding for user requirements.

  • Excellent price-quality ratio
  • Very simple operation
  • 4-20 mA linear output
  • Ideal for small gas boiler rooms, parking garages, battery charging rooms and refrigerant leaks
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Designed for use in boiler rooms and parking garages, The OLC 10 monitors give you the most cost-effective solution for the continuous monitoring of toxic or flammable gases and vapors in ambient air.

The OLC 10 is easy to install and operate, these detectors combined such as with the MX 15 , MX 32 control unit meet demanding for user requirements.

  • Catalytic sensors
  • 4-20mA output signal with OLCT 10
  • Dust and humidity resistant
  • Fast and accurate response
  • ATEX Approval for use in hazardous areas (zone 2)
  • OLC 10 TWIN allows connection of 2 sensors with
    a single channel without any additionnal junction box.
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