A measurement station for measuring airborne molecular contamination includes at least one gas analyser, at least two controllable isolation valves connected in parallel to the input of the at least one gas analyser, a conditioning pump, at least two calibrated orifices connected in parallel to the input of the conditioning pump, at least one distributor to connect each controllable isolation valve with, on one side, a sampling line and, on the other side, a calibrated orifice, and a control unit linked to the controllable isolation valves. The control unit commands the opening or the closing of the controllable isolation valves in order to be able to connect the at least one gas analyser with at least one sampling line.

The invention relates to a particle detection device and a method for detecting particles in a fluid by means of separation. A channel structure is arranged for separating an incoming flow into a major flow comprising a minor portion of particles above the first predetermined size and a minor flow comprising a major portion of particles above the predetermined size. One or more detectors are arranged for detecting particles in the major flow and minor flow. The channel structure further comprises a choked flow restriction arranged for enabling a constant flow independent of pressure conditions.

An exhaust gas sampling system includes a main conveying line, a main throughput pump which conveys a sample gas in the main conveying line, a first Venturi nozzle, a second Venturi nozzle, a first control valve, and a second control valve. The first Venturi nozzle and the second Venturi nozzle are connected in parallel and are arranged in the main conveying line upstream of the main throughput pump. The first Venturi nozzle is assigned the first control valve. The second Venturi nozzle is assigned the second control valve. Each of the first control valve and the second control valve are provided as a pinch valve. Each pinch valve has a flexible, hose-like control element and a pressure chamber which is filled with a fluid and which is arranged to surround the flexible, hose-like control element.

Disclosed is a sampling device, a sampling system and a method of collecting samples of particulates. Also disclosed a sampling device, a sampling system and a method of generating data associated with the collection of the samples of particulates. Also disclosed is a system and method for analysing the sample data to identify the particulates in the collected samples and their one or more characteristics which may be correlated with the surrounding environment.

Disclosed is a sampling device, a sampling system and a method of collecting samples of particulates. Also disclosed a sampling device, a sampling system and a method of generating data associated with the collection of the samples of particulates. Also disclosed is a system and method for analysing the sample data to identify the particulates in the collected samples and their one or more characteristics which may be correlated with the surrounding environment.

Aspects of the disclosure are directed to apparatuses and methods involving particulate sampling. As may be consistent with one or more embodiments, an apparatus includes a flow direction structure, a flow sampler and a particle collector having a collecting surface. The flow direction structure has interior sidewalls that direct the flow of particulate-laden gas along a flow path. The flow sampler is located in the flow path within the interior sidewalls, and operates with the flow direction structure to sample a portion of the particulate-laden gas at a reduced velocity, while allowing another portion of the particulate-laden gas to exhaust around the flow sampler. The flow sampler operates with the particle collector to direct the sampled portion of the particulate-laden gas to the collecting surface, and to adhere particulates from the particulate-laden gas to the collecting surface.

An exhaust gas sampling system includes a main conveying line, a main throughput pump which conveys a sample gas in the main conveying line, a first Venturi nozzle, a second Venturi nozzle, a first control valve, and a second control valve. The first Venturi nozzle and the second Venturi nozzle are connected in parallel and are arranged in the main conveying line upstream of the main throughput pump. The first Venturi nozzle is assigned the first control valve. The second Venturi nozzle is assigned the second control valve. Each of the first control valve and the second control valve are provided as a pinch valve. Each pinch valve has a flexible, hose-like control element and a pressure chamber which is filled with a fluid and which is arranged to surround the flexible, hose-like control element.

The invention relates to a particle detection device and a method for detecting particles in a fluid by means of separation. A channel structure is arranged for separating an incoming flow into a major flow comprising a minor portion of particles above the first predetermined size and a minor flow comprising a major portion of particles above the predetermined size. One or more detectors are arranged for detecting particles in the major flow and minor flow. The channel structure further comprises a choked flow restriction arranged for enabling a constant flow independent of pressure conditions.

The present disclosure provides a device for collecting semi-volatile or non-volatile substance, including an air nozzle, a front cavity and a collecting body. The air nozzle is configured to eject air to a sample attachment surface. The front cavity has an upper port. The collecting body is sealingly connected to a lower end of the front cavity, inside of which is provided with a cylindrical cavity and a conical cavity arranged vertically coaxially, and bottom of which is provided with a sample outlet. The collecting body is provided with an air intake passage which is non-coplanar with respect to an axis of the cylindrical cavity and is disposed obliquely downward and inward. The collecting body is further provided with an air exhaust passage one end of which is a discharge port connected to the interior of the cylindrical cavity, the other end is connected to an air pump.

Disclosed is a sampling device, a sampling system and a method of collecting samples of particulates. Also disclosed a sampling device, a sampling system and a method of generating data associated with the collection of the samples of particulates. Also disclosed is a system and method for analysing the sample data to identify the particulates in the collected samples and their one or more characteristics which may be correlated with the surrounding environment.