Safe area addressable gas detector: TOC-750

Clinical Trials & Research

International Gas Detectors have created the revolutionary 750 safe area addressable gas detectors. All detectors are joined on a single two-core cable for the purpose of both communication and power by utilizing their advanced Sentinel+™ communication.

Image Credit: International Gas Detectors Ltd

The 750 safe area gas detectors from International Gas Detectors are provided with sensor options for over 400 gases and vapors, making it the most multipurpose sensor available commercially.

Gas type

  • Ammonia (NH3): 0–100 ppm up to 0–5000 ppm
  • Carbon dioxide (CO2): 0–5000 ppm or 0%–5% VOL
  • Carbon monoxide (CO): 0–100 ppm
  • Chlorine (Cl2): 0–5 ppm
  • Ethylene (C2H4): 0–200 ppm
  • Ethylene oxide (ETO): 0–10 ppm
  • Flammable (FLAM): 0%–100% LEL
  • Fluorine (F2): 0–1 ppm
  • Formaldehyde (CH2O): 0–5 ppm
  • Hydrogen (H2): 0–1000 ppm
  • Hydrogen fluoride (HF): 0–10 ppm
  • Hydrogen chloride (HCL): 0–10 ppm
  • Hydrogen sulfide (H2S): 0–50 ppm
  • Hydrogen cyanide (HCN): 0–10 ppm
  • Hydrogen bromide (HBR): 0–20 ppm
  • High-range carbon monoxide (HCO): 0–2000 ppm
  • Infrared flammable (IRF): 0%–100% LEL
  • Nitrogen dioxide (NO2): 0–5 ppm
  • Nitric oxide (NO): 0–25 ppm
  • Oxygen (O2): 0%–25% VOL
  • Ozone (O3): 0–5 ppm
  • Phosphine (PH3): 0–5 ppm
  • Sulfur dioxide (SO2): 0–5 ppm
  • Silane (SiH4): 0–10 ppm
  • Volatile organic compounds (VOC): 0–200 ppm and 0–2000 ppm

For both power and communication, the 750 safe area addressable gas detector only utilizes a two-core cable (daisy-chained to a master control panel and other detectors). When compared to conventional gas detectors, this enables users to save installation costs by up to 70%.

Users can upgrade their present-day systems easily and can utilize the wiring again, enabling them to upgrade old analog systems quickly and effectively and at a low cost.

Unique labyrinth sensor design

The molded detector includes a built-in baffle/splash guard in the front. This guard ensures the detector is completely protected by a labyrinth arrangement. While gas can penetrate, harmful dirt and splashes are unable to.

The life of the detector is prolonged by this feature, and maximum performance is always ensured.

The molding and final assembly ensure that the detector compartment is sealed away from the terminal box and electronics compartment, which stops the entry of corrosive gases, moisture, etc., where they could cause damage.

The molded detector front can also be equipped with pitot sample assemblies, calibration adaptors and pipe-in-pipe adaptors.

The calibration adaptor has been developed to present gas in the same way as it happens in routine operations, which makes it possible to carry out traceable checks and calibrations, which are vital in any safety system.

Multiple I/O points per detector

On the 750 safe area addressable detectors from International Gas Detectors, numb output and input options are included.

This means that a single detector can handle up to seven other devices, including, but not limited to, displays, other gas detectors, gas supply valves, slam switches, analog devices (third party included) and beacon sounders.

This feature means that users are supplied with a multipurpose detector, decreasing installation and cabling needs and supplying much-needed distributed control without the necessity for costly I/O cards.

Safe area detector ABS design

The tough ABS detectors provide a high level of chemical resistance and do not corrode. The 750 addressable safe area gas detectors are IP54 rated.

The detectors, electronics and sensor testing integrated into the 750 safe area addressable gas detectors are exactly the same as those that are utilized in International Gas Detectors’ ATEX variant.

The only difference in these models is the housing material, so users are not expected to pay for an ATEX-rated detector if they do not require one.

Safe area addressable gas detectors can be employed in applications that are not zoned ATEX locations. Since its detectors are doing the same kind of job, International Gas Detectors ensures that the quality of the detection is identical.

With conduit knock-outs pre-molded, the housing can be mounted on the wall. The TOC-750 series addressable gas detector housing can also be mounted to Dado trunking or flush wall-mounted as they are a standard two-gang mount.

Replaceable sensor fronts and auto changeover

The 750 safe area addressable gas detector is supplied with sensor fronts which can be replaced easily. This means that users can easily substitute the detector front side with a pre-calibrated one when the sensor reaches its end of life.

In order to considerably decrease ongoing maintenance costs, the detectors utilize an easy plug-and-play technology.

AUTO detect, and AUTO changeover features are also included in all of the 750 addressable gas detectors from International Gas Detectors.

This means that by simply swapping the fronts, the gas type of the detector can be changed, and the system will spot this change and set it up automatically. This is ideal for locations such as rented laboratories.

Sentinel+ addressable communication

In order to communicate across the two-core power cable, the 750 series detectors use the Sentinel+™ 2-wire protocol. This decreases cabling costs considerably (by around 70% to 80% when compared to existing commercially available systems). Reliability is increased, while terminations are also made easy.

To ensure the highest availability and integrity and of the system, the Sentinel+™ protocol tracks data between the system controller and the connected detectors constantly.

Existing systems can be upgraded easily by utilizing only a pair of wires for power and communication. This can be performed by using the original cabling, with the option to include more devices and detectors as and when required.

About International Gas Detectors Ltd

International Gas Detectors (IGD) develops, manufacture and market a complete range of gas detection products to protect people and plant against gas hazards in industry, research and commercial applications.

IGD have been specialists in gas detection technology for over 90 years, since the company’s establishment in 1917. Our Gas Monitoring products, which can be found worldwide, are manufactured in the UK to ensure that the highest quality is achieved.

We offer a vast and versatile product range with detector heads for every possible environment. Pioneering the use of addressable gas detection systems IGD today offer the latest networked systems. Our latest addressable gas detection systems network using IGD’s Sentinel+ 2-Wire protocol for enhanced operation and security. IGD is the home of addressable gas detection but we still offer legacy analogue detectors used to interface to older systems.

Our Addressable Gas Detection technology has been utilised extensively for the last 15 years in all industries from Offshore and Onshore Oil and Gas Industry through to Construction, Building Management and Ventilation.

International Gas Detectors Ltd also provides a variety of installation, calibration, commissioning and repair services to keep your personnel and plant safe. Not only do we present on-going traceable calibration and maintenance for our own gas detection systems but also those from other major brands of detection equipment.


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