Transportable gas detector unit having mounted gas sources for gas sensor testing and calibration

A transportable gas detector unit comprising:

• a controller and a battery contained within the transportable gas detector unit;
• one or more source inlets for connection to one or more gas sources, said gas sources mounted on the transportable gas detector unit by mounting points on the transportable gas detector unit, the mounting points being configured to rigidly hold the gas sources in place when the transportable gas detector unit is moved;
• a chamber comprising a gas-permeable portion to allow gaseous communication with an outside environment and one or more source outlets configured to receive gas from the one or more source inlets;
• a gas sensor in communication with the controller and positioned within the chamber;
• a flow switch controlled by the controller, the flow switch configured to allow the received gas to be introduced directly into the chamber via the one or more source outlets;
• and
• a wireless transceiver configured to enable communication between the controller and a remote computer;
• wherein the transportable gas detector unit is configured to:
• in a detection mode, detect gases entering the chamber through the gas-permeable portion from the outside environment;
• and
• in a test mode, introduce gas via the one or more source outlets and test that the gas sensor is detecting the introduced gas;
• and
• wherein the transportable gas detector unit is moveable and includes a handle.