A gas-detecting apparatus, having a gas inlet and a gas outlet, for detecting a false alarm is disclosed. The gas-detecting apparatus comprises a control module, a sensor module, and an air chamber. In an example embodiment, the sensor module is electrically connected with the control module. The sensor module has a sensor inlet and a sensor outlet. The sensor inlet is fluidly coupled to the gas inlet of the gas-detecting apparatus. The air chamber has an air inlet and an air outlet, wherein the air inlet is fluidly coupled to the gas inlet of the gas-detecting apparatus and the air outlet is fluidly coupled to the gas outlet. The control module is configured to receive a first sensing signal for a first level of gas from the sensor module and determine whether magnitude of the first sensing signal is higher than a first threshold value. In an instance when the magnitude of the first sensing signal is higher than the first threshold value, the control module causes the air chamber to supply ambient air to the sensor module through the sensor inlet of the sensor module.

A gas-detecting apparatus, having a gas inlet and a gas outlet, for detecting a false alarm is disclosed. The gas-detecting apparatus comprises a control module, a sensor module, and an air chamber. In an example embodiment, the sensor module is electrically connected with the control module. The sensor module has a sensor inlet and a sensor outlet. The sensor inlet is fluidly coupled to the gas inlet of the gas-detecting apparatus. The air chamber has an air inlet and an air outlet, wherein the air inlet is fluidly coupled to the gas inlet of the gas-detecting apparatus and the air outlet is fluidly coupled to the gas outlet. The control module is configured to receive a first sensing signal for a first level of gas from the sensor module and determine whether magnitude of the first sensing signal is higher than a first threshold value. In an instance when the magnitude of the first sensing signal is higher than the first threshold value, the control module causes the air chamber to supply ambient air to the sensor module through the sensor inlet of the sensor module.

A vacuum insulator (10) includes: a core (13); a pressure sensor (51) that detects a pressure; a transmitter (52) that transmits, by wireless communication, the detected pressure detected by the pressure sensor (51); a power feeder (53) that feeds electric power to the pressure sensor (51) and the transmitter (52); and an outer skin (14), an inside of which is decompressed, the outer skin (14) accommodating therein the core (13), the pressure sensor (51), the transmitter (52), and the power feeder (53), the outer skin (14) having gas barrier capability.

A milling machine includes a cutting rotor, a foldable conveyor, a sensor, and a controller. The cutting rotor is configured to mill material beneath the milling machine. The foldable conveyor is configured to receive and dispose the milled material and includes a first section and a second section foldable with respect to the first section at a fold structure. The sensor is positioned on the milling machine and configured to sense a value indicative of a force acting on the second section. The controller is configured to determine an amount of the milled material within the second section of the foldable conveyor using the value indicative of the force.

Systems and methods for controlling extraction of landfill gas from a landfill via a gas extraction system are provided herein. According to some aspects of the technology, there is provided site-level control methods for globally controlling one or more wells based on one or more characteristics of aggregate landfill gas collected from a plurality of wells at a gas output. According to some aspects of the technology, there is provided well-level control methods for locally controlling a first well based on or more characteristics of landfill gas collected from the first well. According to further aspects of the technology, there is provided hybrid control methods for making adjustments to a respective well based on both site-level and well-level control methods.

Systems and methods for controlling extraction of landfill gas from a landfill via a gas extraction system are provided herein. According to some aspects of the technology, there is provided site-level control methods for globally controlling one or more wells based on one or more characteristics of aggregate landfill gas collected from a plurality of wells at a gas output. According to some aspects of the technology, there is provided well-level control methods for locally controlling a first well based on or more characteristics of landfill gas collected from the first well. According to further aspects of the technology, there is provided hybrid control methods for making adjustments to a respective well based on both site-level and well-level control methods.

A method for manufacturing a pressure detecting unit for a measuring device for measuring a pressure status value of a plant specimen. The method includes mounting a sensor unit for detecting the pressure status value at a carrier substrate, fastening a frame to the carrier substrate, the frame including a fastening surface, a contact surface oriented opposite the fastening surface and an inner surface defining an opening and extending between the fastening surface and the contact surface, the frame being situated at the carrier substrate in such a way that the fastening surface faces the carrier substrate and the inner surface surrounds the sensor unit, and filling the opening of the frame with a filling material for forming an elastic pressure coupling layer. A pressure detecting unit for a measuring device for measuring a pressure status value of a plant specimen is also described.

The present application discloses a long-term, in-situ sampling and analysis device for sediment pore water and a method thereof. The long-term in-situ sampling and analysis device for sediment pore water includes a bracket, a probe, an elevator, a diverting device, a first water storage device, and a second water storage device, a peristaltic pump, a dissolved gas of sediment pore water analysis device and an in-situ environment measurement device. The present application can collect and store the sediment pore water in an in-situ, long-term and time-phased manner, and in low measuring error level.

A heat-loss pressure microsensor for measuring a gas pressure is disclosed that includes a plurality of pressure gauges arranged proximate to one another on a substrate. The gauges may include a pair of gauges, each gauge including a thermistor having an electrical resistance that varies with its temperature, the thermistor's temperature being responsive to the gas pressure, a platform to receive the thermistor, and a support structure to hold the platform above the substrate. Each gauge may be configured to produce a gauge output signal related to the electrical resistance of its thermistor. The two gauges are configured with their platforms having equal nominal perimeters and different nominal surface areas, and their support structures having the same nominal geometry. A differential signal may be obtained from the two gauge output signals. The differential signal conveys information about the gas pressure and exhibits reduced sensitivity to fabrication-related dimensional variations.

A Process Critical Thermal Conductivity Gauge (PCTCG) instrument relies on gauge chamber wall above-ambient-temperature-control (AATC) to provide improved accuracy and thermal stability with reduced and linearized temperature coefficients. A sensor resistor is exposed to gas pressure in a gauge chamber. AATC is provided by control of a heater that heats a chamber wall to control temperature difference between the sensor resistor and chamber wall. An example application of this technology is to end-point detection in lyophilization where the TCG is used to track partial pressures of water in binary gas mixtures.