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Oliver IGD has added the Tocsin 102 photo-ionisation (PID) ATEX-certified detector to its range of sensors.

The Tocsin 102 PID is capable of detecting more than 400 chemical substances, meaning that this sensor can be a major part of any detection system covering volatile organic compounds (VOCs), HAZMAT, weapons of mass destruction (WMDs), toxic gases, bio-threats, trace gases and process escapes.

The Tocsin 102 is a low-cost device measuring 50 x 80mm; weighing 510g, it is lightweight and can be combined with many passive sampling options for inline applications.

With most devices utilising a pump for sample collection and the lifetime issue of the PID lamps, Oliver IGD offers an alternative, with the Tocsin 102 designed as a normal diffusion device requiring no pump or moving parts, considerably reducing breakdowns and maintenance requirements.

Being a diffusion device, the atmosphere is not forced to the detector with a pump, which reduces lamp contamination; this enhances the self-cleaning capability, further reducing the requirements for maintenance and personnel intervention.

To further extend the PID capability, the Tocsin 102 features a built-in duty cycle option.

This enables customers to initiate an alternating period of detection and rest, extending lamp and sensor lifetime.

The customer-set duty cycle will be overridden by any gas levels being detected above a customer-set threshold level and the device will then move into continuous detection until the gas levels fall below the threshold for a period of time, again set by the customer.

An industrial Tocsin 103 analogue (4-20mA) and addressable version is scheduled to be released in January 2010.

Oliver IGD

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