Honeywell International Inc.

Honeywell Analytics Limited

Chuang Huang

Li Liu

Feng Liang

Bing Chen

Guokun Song

Tengfei Zhang

Jianli Liu

Xianyong Fan

Yuhui Xu

Xiufeng Tan

Qingling Wang

Xiangcai He

Embodiments are provided for ultraviolet lamps for use in photoionization detectors and methods of manufacturing same. An example method of manufacturing an ultraviolet lamp includes providing a glass tube, the glass tube defining a first end; applying a mixed powder coating composition onto an edge surface of the first end of the glass tube, the mixed powder coating composition comprising indium powder and glass powder; applying a glass powder coating composition over the mixed powder coating composition; attaching a crystal window to the edge surface of the first end of the glass tube; and heating the glass tube and the crystal window to seal the crystal window to the glass tube.

Photoionization detector lamp and its method of manufacture

A calibration system for calibrating a gas detector includes a control unit and a temperature regulation assembly electrically connected with the control, a temperature sensor electrically connected with the control unit, a set of valves comprising a first valve, a second valve, and a third valve, and a feedback conduit. The control unit is configured to determine whether a temperature of the gas detector is within a predefined temperature range and calibrate the gas detector in an instance in which the temperature is within the predefined temperature range.

Method and system for calibrating a gas detector

The present application discloses a dehumidifier and a dehumidification system. The dehumidifier comprises a housing and a water absorber located in the housing. An opening and a plug are provided at a lower portion of the housing. The plug is used to seal the opening, and the water absorber can be removed via the opening when the opening is open. A conduit is provided above the housing, an upper gas inlet and an upper gas outlet are provided on the conduit, a gas to be dehumidified enters the conduit via the upper gas inlet and is discharged from the conduit via the upper gas outlet, and the water absorber is used to absorb water in the gas. The dehumidifier according to the present application is easily maintainable.

Dehumidifier and dehumidification system

The gas detector calibration system comprises a control unit, a temperature regulation assembly, a pump, and a temperature sensor. The temperature regulation assembly has an inlet and an outlet, and the pump has a pump inlet and a pump outlet. The outlet of the temperature regulation assembly is coupled to the pump inlet of the pump. The temperature regulation assembly receives ambient air through the inlet, regulates a temperature of the ambient air, and supplies the ambient air to the pump through the outlet. The pump supplies the ambient air to a gas detector for regulating a temperature of the gas detector. The temperature sensor detects the temperature and sends a signal indicative of the temperature to the control unit. The control unit determines whether the temperature is within a predefined temperature range, when within the predefined temperature range, the gas detector is calibrated using a calibration gas.

Methods and systems for detecting and limiting the water in a photoionization detector are provided. The method may include powering off a lamp configured to ionize particles of air. The method may also include monitoring a signal from the photoionization detector. The signal may be monitored based on a current between a signal electrode and a bias electrode. In an instance the signal is above a signal threshold, the method may also include electrolyzing one or more particles of water present in the photoionization detector by closing a leakage switch in order to allow current to flow through the bias electrode and the signal electrode. In an instance the signal is below the signal threshold, the method may include powering on the lamp to begin photoionization detection. Corresponding systems are also provided.

Methods and systems for limiting water within a photoionization detector

Methods, apparatuses, and systems for providing an alternating current (AC) voltage supply for a photoionization detector lamp from a direct current (DC) voltage source are provided. An example apparatus may include a DC voltage to DC voltage (DC/DC) converter circuitry, and a feedback circuitry that is electronically coupled to the DC/DC converter circuitry and converts a reference AC voltage to a feedback DC voltage for the DC/DC converter circuitry. In some examples, the feedback circuitry may be electronically coupled to a DC voltage to AC voltage (DC/AC) converting circuitry to obtain the reference AC voltage.

Method, apparatus and system for providing voltage supply for photoionization detector lamp

A method, system, and apparatus for measuring mass flow comprises two tubes for transporting a material; two exciters wherein one of the two exciters is fixedly attached on each of the two tubes configured to induce a vibration in the two tubes; at least two sensors on each of the tubes; a test media flowing through the tube, wherein a phase difference in the tubes is indicative of a mass flow of the test media; and a comparer module operably connected to the at least two sensors on each of the tubes for determining a phase difference of the vibrations in the tubes and determining a mass flow according to the phase difference.

Mass flow primary with exciter

An exciter associated with a mass flow primary comprises a rigid plate comprising a base, two outer struts, and an inner strut; at least one electromagnet formed over the inner strut; a protection circuit associated with the electromagnet; and an exciter circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter.

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Shanghai, China

Chuang Huang