Provided herein is a collection device for collecting nano particles conveyed in a fluid including: a fluid duct having a fluid inlet and a fluid outlet, a fluid propelling element propelling said fluid through the fluid duct, and a collection element which is arranged in said fluid duct for the collection of nano particles conveyed in said fluid. The collection element includes a collection surface and an enhancement structure arranged in connection with the collection surface. The nano particles are deposited in the region of said collection surface and said enhancement structure and the collection surface with the enhancement structure enhances the spectral properties of said nano particles for a facile analysis of the amount of collected nano particles.

A low weight portable air sampling device comprising a housing at least partially enclosing an inlet for receiving an air or breath sample; a removable liner coupled to the inlet containing sorbing materials; a micro-pump for regulating air flow within the device; and an outlet for emitting the air or breath sample from the device is described. The device may be used to collect Volatile Organic Compounds (VOCs) of both biotic and abiotic origin.

The present disclosure relates to a novel personal sampler for bioaerosols and the method of making and using the personal sampler.

A gas-sensing apparatus with gas convection capability includes a gas sensor mounted inside a container, a substrate forming a bottom plate of the container and an actuator. The gas sensor is mounted over a first surface of the substrate internal to the container. The actuator is coupled to a second surface of the substrate external to the container. The actuator can cause convection of a gas within the container by enabling movements of the substrate in response to an activation signal.

A gas sampler device has a top plate with a concaved outer wall. The concaved outer wall allows users easily to lift the top plate off of the bottom plate without disturbing the bottom plate because the curved surface permits more positive contact between the outer wall and users' fingers. Moreover, the weight of the top plate is reduced by approximately twenty percent compared to conventional top plates, a feature that also makes it easier for users to lift the top plate off of the bottom plate.

The present invention provides a portable air quality sensing device and a corresponding air quality sensing method. The portable air quality sensing device is equipped with environmental parameter detecting means (10) configured to detect local readings of one or more environmental parameters affecting air quality; retrieval means (150) for retrieving at least one global AQI value and/or at least one global measurement of an environmental parameter affecting air quality contributing to the global AQI value from at least one remote reading data source means (200) via a network (500); and an evaluation device (20) configured to form a local AQI value based on said one or more detected local readings and said at least one global AQI value and/or on said at least one retrieved global reading.

A filter device for filtering nano particles conveyed in a fluid in order to determine an exposure of the filter device to nano particles includes a support element having a top surface, a bottom surface, a lateral surface, and at least one fluid duct having a fluid inlet and a fluid outlet. The top surface and the bottom surface extend substantially parallel to each other. The filter device further includes at least one filter element with a collection surface on which the nano particles are to be deposited. The at least one filter element is arranged in the at least one fluid duct for collecting the nano particles conveyed in the fluid. The collection surface of the at least one filter element is oriented parallel to at least one of the top surface and the bottom surface.

A method includes projecting light to obtain a reference measurement using a first photoresistor; collecting dust on a platform during a collection time interval; and projecting light across the platform to obtain a dust measurement using the first photoresistor or a second photoresistor.

A monitoring device for measuring organic compounds may include a housing of the monitoring device. The housing may be defined by an outer peripheral wall. The outer peripheral wall may include at least a first surface and a second surface opposite the first surface. The monitoring device may further include an interior cavity disposed within the housing. The monitoring device may further include a fan disposed within the interior cavity. The monitoring device may further include a plurality of slots in the first surface. The plurality of slots may be disposed directly above the fan and may be configured to allow the fan to pull ambient air from an environment outside of the housing into the interior cavity. The monitoring device may further include a visual indicator disposed on the first surface. The monitoring device may further include one or more buttons disposed on the first surface.

This portable air sampling apparatus includes a Venturi pump creating a vacuum in a suction inlet when compressed air circulates therein; a supply line supplying the Venturi pump with compressed air, including an electrovalve that controls circulation of compressed air in the supply line; a suction line to suction an air sample, having an air circulation member delimiting a chamber for removably receiving a substrate for capturing odorous molecules and suitable for circulating the suctioned air sample through the substrate; and an electronic unit, connected to the electrovalve, controlling its opening and closing so when the electrovalve is opened, compressed air circulates in the supply line through the electrovalve, while when the electrovalve is closed, compressed air circulation in the supply line, between upstream and downstream of the electrovalve, is interrupted by the electrovalve. This enables performing reliable inspections, while being practical and easy to use.