Abstract: A combined pressure and temperature sensor, the sensor comprising at least one first optical sensing element of a first type and at least one second optical sensing element of a second type, wherein the sensor is adapted to compensate for temperature and/or pressure effects in the first or second optical sensing element using a response of the other of the second or first optical sensing elements.

Abstract: A golf grip alignment device includes a body adapted to fit onto a golf club. The a body includes a tab extending from the body and a seat defined on the body. The tab includes a surface adapted to receive the golfer's thumb. The seat is adapted to receive the golfer's index finger.

Abstract: A golf grip alignment device includes a body adapted to fit onto a golf club. The a body includes a tab extending from the body and a seat defined on the body. The tab includes a surface adapted to receive the golfer's thumb. The seat is adapted to receive the golfer's index finger.

Abstract: An electrical current measuring device, for measuring the current in an electrical conductor (11), includes first and second measurement channels. Each of these channels includes a sensor (12) adapted to be located adjacent the conductor (11) and coupled via optical fibers (14,16) to source circuitry (18) and detector circuitry (20). The sensor (12) incorporates a material (22) which exhibits the Faraday magneto-optic effect and the source circuitry (18) is arranged to deliver an unpolarized light signal which is subsequently polarized by a first polarizer (23) to enable a linearly polarized light signal to be incident to the material (22). The quantum of rotation in the plane of polarization imposed on the signal emerging from the material (22) is monitored via a second polarizer (24) by the detector circuitry (20) as a measure of the electrical current flowing in the conductor (11).