PRODUCT OF THE MONTH

The Deadman Timer System

The Fluid Transfer Deadman Timer System is a unique system that considerably enhances the effectiveness of existing electrical deadman systems and therefore provides extra safety assurances to the airlines. The Timer system is designed to deter the illicit overriding of the remotely held deadman handswitch.

A switch is incorporated within deadman handswitches which controls the flow of product. When the handswitch is released a control circuit is broken and product stops flowing. The operator therefore is able to react quickly to any incident and terminate flow.

Deadman Timer

Unfortunately the design of deadman handswitches makes them very easy to override e.g. an elastic band is often used or they can be wedged between pipework. The operator is then at liberty to wander off or become distracted. He has then lost effective control of the fuelling operation.

The Fluid Transfer Deadman Timer System ensures the operator has effective control by demanding a positive input from the operator during fuelling operations. This is achieved by means of a timer circuit that is designed to request a signal at 1.5 minutes and "time-out" after 2 minutes if no signal is returned.

Flow is stopped after this period unless the operator generates a reset signal by releasing and re-gripping the handswitch.

The timer system is very compact and is mounted within an electrical enclosure for fitting in an electrically safe area. This is usually the vehicle cab and due to the small lightweight design of the unit this is possible in any vehicle.

The system is very easily installed on new vehicles. All deadman system connections are routed to and from the board-mounted Timer System connecting block i.e. a fused supply, air solenoid wiring, deadman handswitch wiring, audible and visual prompt wiring.

Size Available:

172mm x 136mm x 85mm

Spec

Deadman Timer System for Refuelling Vehicles PDF Datasheet

The Deadman Handswitch

The Deadman Handswitch incorporates the
following features as standard :

Operating temperature range -40°C to 105°C
Cable gland accept wire sheaths between 5mm and 10 mm in diameter
Maximum voltage rating 100Vdc
Maximum switching current 0.25A
Contacts are normally open, 3 watt rating.
Switching element is hermetically sealed and potted.
Enclosure protection to IP67.
Shock rating to 100G.
In-Stock
Fast Delivery
High Quality
Competitively Priced

Specification:

The FLUID TRANSFER 11101 Deadman Handswitch has been designed specifically to meet the stringent requirements of mobile and fixed aircraft refuelling systems. The handswitch is of rugged and extremely lightweight construction and the design concept has proved to be the industry standard to refuelling personnel in locations worldwide.

Deadman Handswitch

The handswitch embodies features which overcome some of the inherent weaknesses of existing designs in order to improve reliability and serviceability.

The Fluid Transfer Deadman Handswitch provides the operator with the means to terminate product flow in an instant, by simply actuating a lever the operator is able to control refuelling.

Technical Data:

The Deadman Handswitch uses a shock resistant sensor where the switching means is housed in a resiliently mounted compact, easily removable element. The construction of the Handswitch provides for effective water vapour proofing and efficient cable strain relief. Positive retention of the permanent magnet is provided for on the stainless steel actuating lever. The lever is attached to the main switch housing by a stainless steel pivot pin designed to withstand the rigours of a typical operational environment. The lever is gripped to "make" the switch and released to "break" it. Cable termination is via a standard 2-way screw type terminal block located in the rear end of the switch housing.

Spec

Deadman Handswitch PDF Datasheet