An electromagnetic wave sensor cover, applied to an electromagnetic wave sensor including a transmission unit and a reception unit, includes a cover main body portion that covers the transmission unit and the reception unit. The cover main body portion includes: a base material formed of a resin material and having a transmission property of an electromagnetic wave from the transmission unit; an undercoat layer formed on a rear surface of the base material and having the transmission property of the electromagnetic wave from the transmission unit; a heater portion that is formed of copper in a band shape on a rear surface of the undercoat layer, is configured to generate heat by being energized, and adheres to the base material via the undercoat layer; and a SiO.sub.2 coating film having the transmission property of the electromagnetic wave from the transmission unit and covering the heater portion.

A turbidity sensor has a housing, a cuvette for a sample medium, a lighting source, a light sensor, a drying agent and a chamber system. The chamber system includes a central receiving space in which the cuvette is arranged, a lighting chamber adjoined by the lighting source, at least one sensor chamber adjoined by the light sensor, and a drying chamber in which the drying agent is arranged. The lighting chamber, the at least one sensor chamber and the drying chamber are each fluidically connected to the central receiving space. The chamber system is here configured as a passive, pump-free system.

A point of use analyte detection and quantification system for agricultural applications is provided. Related methods are also provided.

A point of use analyte detection and quantification system for aquatic applications is provided. Related methods are also provided.

A point of use analyte detection and quantification system for food or food processing applications is provided. Related methods are also provided.

A transmissometer and method for determining a transmissivity of an atmosphere within a chamber. A chamber contains the atmosphere. A light source generates a test beam and a light detector detects the test beam. A periscope is movable between a first position which allows the test beam to pass through the atmosphere in the chamber and into the light detector and a second position in which the test beam is deflected to pass into the light detector without passing through the atmosphere in the chamber. A processor determines the transmissivity of the atmosphere from a transmissivity measurement for the test beam obtained by the light detector when the periscope is in the first position and a transfer standard obtained at the light detector when the periscope is in the second position.

The invention refers to an optical measurement apparatus (10) with an optical device (18,20,22) and a liquid sample vessel (12) for measuring an optical parameter of a liquid sample (13) in the liquid sample vessel (12), comprising a drying circuit circulating drying air for venting the sample vessel (12), wherein the drying circuit comprises a mechanical water stop means (100) in the course of the drying circuit, the water stop means (100) comprising a conduit body (102) with a water-absorbing swelling element (120) arranged within the conduit body (102). The water stop means is simple and inexpensive and reliably protects all elements downstream of the water stop means from a water ingress upstream of the water

A heater (22) for heating a substantially transparent or translucent cover of a reaction vessel. The heater has a board (80) having a front face, an opposing back face, and an aperture (1062) through which an excitation beam can pass into a reaction vessel via a cover of the reaction vessel, and/or through which reaction light can pass from the reaction vessel via the cover. A thermally conductive, heat-spreading layer (86) radiates heat towards the cover, the heat-spreading layer being arranged on the front face of the board that is arranged to face the cover. At least one heating element outputs heat to the heat-spreading layer (86), the heating element being arranged on the back face of the board that is arranged to face away from the cover. The heat-spreading layer (86) is in thermal communication with the heating element by at least one heating via 82 through the board.

A turbidity sensor has a housing, a cuvette for a sample medium, a lighting source, a light sensor, a drying agent and a chamber system. The chamber system includes a central receiving space in which the cuvette is arranged, a lighting chamber adjoined by the lighting source, at least one sensor chamber adjoined by the light sensor, and a drying chamber in which the drying agent is arranged. The lighting chamber, the at least one sensor chamber and the drying chamber are each fluidically connected to the central receiving space. The chamber system is here configured as a passive, pump-free system.

A gas sensor includes: a gas detection unit including a light source and a detector; and a gas passage including a first end, a second end and a hollow part. The hollow part has a shape in which a cross-sectional area of a flow passage grows smaller. The gas passage includes: a member that divides the hollow part into at least a first area and a second area; a gas inflow port; and a gas outflow port. The gas flows from the gas inflow port into the hollow part, flows in the first area to arrive at the gas detection unit, and the gas located in the gas detection unit flows in the second area and flows out from the gas outflow port.