Abstract: A chassis assembly is disclosed for housing at least one circuit board. The chassis has a first chassis part, a second chassis part, and at least three shock absorbers. The first chassis part has a first end and a second end, and a first external surface extending between the first end and the second end. The first chassis part also has a first longitudinal axis extending from the first end to the second end. The second chassis part has a third end and a fourth end and a second external surface extending between the third end and the fourth end. The second chassis pat has a second longitudinal axis extending from the third end to the fourth end. The first and second chassis parts are adapted to cooperate to secure the at least one circuit board within a boundary defined by the first and second external surfaces. The at least three shock absorbers are positioned on the external surfaces of the first and second chassis parts.

Abstract: The disclosure provides a sensor cartridge that includes a protective housing that is resistant to downhole oilfield environment; a sensor within the protective housing able to measure a parameter of the down-hole oilfield environment; an attaching device to interconnect with another sensor cartridge and/or a hub; a data communication unit within the protective housing, the data communication unit providing wireless communication of the measured parameter to the other sensor cartridge and/or the hub when interconnected with the other sensor cartridge and/or the hub; and a power unit within the protective housing, the power unit providing power supply to sensor and/or data communication unit.

Abstract: The invention provides a sensor cartridge comprising: (a) a protective housing (10), the protective housing being resistant to downhole oilfield environment; (b) a sensor (1) within the protective housing able to measure a parameter of the down-hole oilfield environment; (c) an attaching means (5) to interconnect with another sensor cartridge (102) and/or a hub (1OO); (d) a data communication unit (6) within the protective housing, the data communication unit providing wireless communication of the measured parameter to the other sensor cartridge and/or the hub when interconnected with the other sensor cartridge and/or the hub; and (e) a power unit (7) within the protective housing, the power unit providing power supply to sensor and/or data communication unit.