Cartridges for the voltammetric detection of fluid parameters in a fluid sample are provided. The cartridges contain a sample reservoir containing two compartments fluidically separated by a barrier. Each compartment contains a chemical compound to facilitate voltammetric detection of a fluid parameter. A fluid collection device containing a fluid sample can be received by the sample reservoir, and the barrier can be penetrated by the fluid collection device, to thereby cause contact between the fluid sample and both chemical compounds. Upon introduction of the fluid sample in the sample reservoir a fluid parameter can be voltammetrically detected. Related assemblies including the cartridges, as well as methods for operating the cartridges are also described.

A pH monitoring system includes a first pipe, and a second pipe and a third pipe each branched from the first pipe, a drain connected to the third pipe, a sensor module connected to the second pipe, the sensor module including an inlet valve connected to the second pipe, an outlet valve connected to the drain, and a chamber configured to receive a chemical liquid therein, and a pH sensor mountable to the sensor housing. The sensor module is disposed in parallel to the third pipe.

A portable sensor includes a probe and a housing. The probe comprises a sensing part with one or more sensing elements, while the housing is designed to secure the probe such that the sensing part extends outside the housing. The portable sensor defines a gap between the probe and a surface of the housing that is configured to receive a rim of a liquid container such that the portable sensor can slot onto a rim of a liquid container, so as to allow hand-free measurements.

A gas sensor including: a sensor element extending in an axial direction; a metal shell surrounding and supporting the sensor element; an exterior tube that is tubular and is mounted to a rear end of the metal shell; a metal terminal including a first end connected to a lead wire and a second end electrically connected to the sensor element; a separator that is tubular and is disposed in the exterior tube and contains the metal terminal and the sensor element; and a holder being in contact with the separator in the axial direction. The holder includes ribs formed in a frontward face or a rearward face of the holder and arranged at predetermined intervals in a circumferential direction. Each of the ribs occupies a region having a length equal to or greater than a thickness of the holder, as viewed in the axial direction.

The invention relates to a device for electrochemical measurements comprising an electrolytic fluid vessel characterized in that tire electrolytic fluid vessel (1) composes an electrolytic fluid chamber (5) having a lower opening (4) below which there is an essentially cylindrical portion (3) of the vessel with an essentially cylindrical closure (11), wherein the walls of the cylindrical portion (3) and the closure (11) are threaded in such a way that the closure can move in the cylindrical portion approaching the lower opening (4) and moving away from it, wherein the electrolytic fluid vessel has a side recess (6) for inserting between the closure (11) and the lower opening (4) the working electrode (12) with dimensions allowing the lower opening (4) to be closed with it.

A measuring device includes: a first electrode and a second electrode immersed in sample water stored in a measuring tank; a motor that rotates the first electrode; and a controller that operates, based on measurement results of current flowing through the sample water, in a measuring mode. In the measuring mode, the controller calculates a concentration of a measurement target in the sample water. The motor changes a rotational velocity of the motor.

A measuring device includes: a first electrode immersed in sample water stored in a measuring tank; a second electrode immersed in the sample water; and a controller that: causes a power source to flow a current through the sample water between the first electrode and the second electrode; detects, based on a first digital signal, an interruption whereby an analog signal fluctuates by no less than a predetermined value; and calculates, based on a second digital signal, a concentration of a measurement target in the sample water. The first digital signal is acquired by sampling the analog signal with a first sampling period. The analog signal is based on the current flowing through the sample water. The second digital signal is acquired by sampling the analog signal with a second sampling period that is longer than the first sampling period.

A sensor arrangement for determining at least one measurand of a measuring medium includes at least one first sensor with a first sensing element used to record measured values of a first measurand of the measuring medium, a housing having a housing wall which surrounds a housing interior containing the first sensing element, wherein the housing interior contains a medium in particular, a liquid which has a predetermined value of the first measurand.

An electrochemical measurement system (1) includes: an insertion mechanism (4) which is capable of moving relative to a microplate (2) having a plurality of reactors which are arrayed and which contain a respective plurality of types of solutions, the plurality of types of solutions being mixtures of a plurality of types of mother liquids in different proportions; and a microelectrode unit (19) which is attached to the insertion mechanism (4) such that the microelectrode unit (19) is capable of being inserted into the plurality of types of solutions contained in the plurality of reactors.

The invention relates to an intelligent safety valve comprising a valve body having a first valve inlet, a valve outlet and a first sensor compartment, the first sensor compartment including a first sensor assembly, the first sensor compartment being arranged in the valve body, a first closing unit suitable for closing the intelligent safety valve, an actuator mechanically connected to the first closing unit in order to close the first closing unit, and a control unit which is connected to the actuator and is suitable for controlling the actuator, wherein the control unit is connected to the first sensor assembly in order to evaluate sets of measured values from the first sensor assembly, and wherein the first sensor assembly comprises at least one analysis sensor, for example a pH sensor, a conductivity sensor or an oxygen sensor.