There are extremely strict rules regarding the use of any electrical device near a petrol pump as there is a possibility of petrol vapour entering the device which might cause an explosion. Only certain gauges, Like the PCL-D60, with an IP66 rating are certified for this purpose.
There are Clip-on and Hold-on connectors, each available in open and closed end variations.
Open end connectors are used on all modern PCL Tyre Inflators and gauges
Closed end connectors are used on airline hoses without an inflator control. This will then “close” or block the flow of air until it is connected to a tyre valve which will then open the connector to allow inflation to commence.
Clip-on connectors are used on systems where the connection needs to be for an extended period, for example, when inflating a tyre that is completely deflated. This type of connector is ideal for use in a tyre shop where new tyres are fitted.
Hold-on connectors are for inflators and gauges where they will only be connected for a short period till the desired pressure is achieved.
o A twin hold-on connector is ideal when connecting to the inner valve of a truck fitted with double wheels.