A method for forming a sensor is provided, together with a sensor formed according to the method. Photoresist material is deposited on a surface of the sensor, and is then patterned and etched to form an array of microlens structures. The structures are spaced close together in a predetermined pattern so that when a reflow process is performed, the structures melt and coalesce to form a barrier. The barrier defines a region for constraining or channeling the flow of reagent and analyte samples u...

The sensor includes a linearly movable mass including two sections and spring means urging one of the sections into operative engagement with means including an actuating element. The sensor also includes means releasably securing the two sections together and means releasing the securing means when the two sections have moved a predetermined distance against the urging of the spring. The two sections may be rollers of a rolamite unit. A flexible band extends around a portion of the two rollers....

A sensor for detecting a rapid temperature rise comprises a thermistor chip electroded on opposing faces and having lead-in wires electrically connected to the faces. The thermistor chip is encapsulated between two ribbons of plastic film which, in turn, are encapsulated between two sheets of copper foil which, in turn, are encapsulated between two layers of plastic film.

An angular position sensor having a housing with an aperture in the form of two mutually inclined slits. Behind the aperture is a linear array of light sensitive elements which intercepts laminar light beams developed by the slits from light from a small light source. The positions of interception of the light on the array constitute a measure of the angular position of the light source in elevation and azimuth.

A load sensor that can be incorporated in a vessel that is to be circumferentially stressed by winding prestressing filaments or bands under tension around the vessel, the sensor being arranged to be mounted in a suitable cavity formed in the wall of the vessel at a zone such that the mouth of the cavity is bridged by prestressing filaments or bands when these are wound on to the vessel, and the sensor comprising a saddle member and the load sensing means serving, in use, to support the saddle m...

An assembly of strain gauges, constituting a fatigue sensor, in which each strain gauge is mounted on a strain multiplier, in the form of a slotted sub-base, and the multiplication factor of each strain multiplier is different.

A solid electrolyte galvanic cell with a metal-oxide reference electrode for determining the oxygen content of high temperature fluids has a portion of the electrolyte projecting into the mass of the reference electrode contained inside a quartz tube. The electrolyte is cemented inside the end of the quartz tube.

A capacitance type pressure transducer for pressure measurements for accurate pressurements under differing temperature and pressure conditions having a mechanical construction wherein the displacement characteristics of the transducer as a function of temperature are equated to a compensating change in capacitance as a function of temperature so that changes in temperature do not change the accuracy of the transducer response; a mechanical configuration of the transducer to provide equivalent t...

In oxygen sensors of the type wherein a barrier separates the cathode from the environment, the anode or reference electrode is either a soluble product electrode (for example silver) immersed in a salt electrolyte or a reactive electrode such as a molten alkali metal, separated from the molten salt electrolyte of the sensor by a membrane of ionically conducting solid through which cations of the salt electrolyte or of the reactive electrode can be transported.

A moisture sensor for a hygrometer and a method of manufacturing such a sensor. The method comprises flattening part of a length of aluminium wire between two elements at least one of which has a smooth flat surface, to form an aluminium strip having at least one smooth flat surface, causing oxidation of at least the smooth flat surface and providing a layer of a second metal over at least part of the oxidized surface, the second metal being preferably a noble metal and securely anchored to the ...