Underground Pipe Network

Urban underground pipe gallery is a municipal public facility that implements unified planning, design, construction and maintenance, and is built in the city underground for laying municipal public pipelines.During the construction of the urban underground comprehensive pipe gallery, the workers are actually working in a closed environment or a closed space. Therefore, it is necessary to plan the operation and pay more attention to the safety protection measures.

gas sensors for underground pipe network

The underground pipe gallery is equipped with various signal lines, heat pipes, gas pipes, telecommunication pipes, water supply pipes, power pipes, etc. It is a place where various signals and transmission objects meet. The long-term fermentation of urban sewage and pipe gallery sewage may produce a certain amount of hydrogen sulfide and methane.If accumulate over a long period, it may also form a safety hazard (hydrogen sulfide, ammonia, and carbon dioxide can cause poisoning, while methane may form an explosive gas mixture that directly threatens the safety of the pipe gallery).In order to fully guarantee the environmental safety of the pipe gallery, it is necessary to monitor its internal environment to achieve real-time and automatic monitoring of the environment in the underground pipe gallery.

It mainly involves temperature and humidity in the pipe gallery, gas leakage, harmful gas detection, etc. By configuring corresponding sensors and alarms in the underground pipe gallery, the geographical location, measurement value or working status of each measuring point are continuously collected. If something unusual happens, the system will automatic alarm and notify the relevant personnel as soon as possible to eliminate the possible danger in the first time, so as to avoid causing large economic losses and affecting the normal operation of the pipe gallery.

Winsen Technology specializes in the development and production of O2 sensor, H2S sensor, ammonia sensor, CO2 sensor, methane sensor and module application solutions, which can adapt to high humidity and highly corrosive environments, providing an effective and reliable guarantee for the monitoring of urban underground pipe gallery environmental systems. .

Portable Solutions of Underground Pipe Gallery

ZE03-H2S/CO/NH3 gas sensor module

ZE03-H2S/CO/NH3 sensor module

The portable gas detector adopts the non-spectrographic infrared absorption principle to measure the gas concentration of CH4, CO2, H2S, CO, and NH3 generated in the sewer pipeline, the operation is simple and convenient.

Underground Pipe Network

Online Networking Solutions of Underground Pipe Gallery

  • For temperature and humidity data, one measuring point can be set every 200 meters.
  • For the gas alarm, it should be arranged according to the actual situation. The concentration of flammable gas in the air of the enclosed space should be lower than 10% of the lower explosion limit. For the maintenance of oil tanks, the concentration of flammable gases in the air should be lower than 1% of the lower explosion limit. Using Winsen non-dispersive infrared (NDIR) MH-440D or MH-741A infrared methane sensor, no oxygen dependence, high sensitivity, high resolution, low power consumption, fast response time.
  • For stagnant water alarm, select low-lying or water-prone areas for monitoring.
  • For harmful gas monitoring, the general situation is to monitor carbon monoxide, hydrogen sulfide, oxygen, methane and other gases, which can be arranged according to the average distance or installed in the feeding port or according to the actual situation. When the concentration of harmful substances is greater than the concentration of IDLH, it is required to wear respiratory protective equipment. Using the Winsen ZE03-H2S/CO/NH3 gas sensor module, using a three-electrode electrochemical gas sensor and a high-performance microprocessor, the corresponding gas can be measured with different gas sensors. The electrochemical sensor and circuit are perfectly combined to meet the needs of customers for different gas detection occasions.
  • For the detection of oxygen content, the normal oxygen content is 18% to 22%, and mechanical ventilation must be adopted during short-term operation.
Municipal administration

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How to choose the right sensor for your project?

We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.

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The first six FAQs. Use the search bar above to reveal more!

Can the Two Voltages of Mq-7 Exist All the Time, or Do They Need to Be Powered Alternately? if It is an Alternate Power Supply, What is the Appropriate Power Supply Time?

It requires alternate power supply. Please check the information on the product manual. This sensor is powered by 1.5V and 5V alternately. The low temperature and low voltage (1.5V) state can detect CO, and the high voltage (5V) is the desorption process. The recommended 5V voltage duration is 60s, 1.5V voltage duration is 90s to alternately supply power. Since it is a desorption process at 5V, it is normal for the voltage to drop when CO is 150ppm.

What is the Difference Between Semiconductor Sensors and Electrochemical Sensors?

There is no good linear correspondence between the gas concentration and voltage of the semiconductor sensor, and it is generally only used for fixed-point calibration products; there is a good linear correspondence between the gas concentration and the output current of the electrochemical sensor, and can be made into quantitative detection products.

What Are the Precautions for Manual Soldering of Semiconductor Sensors?

1. Flux: rosin flux with the least chlorine; 2. Constant temperature soldering iron; 3. Temperature: 250℃; 4. Time: no more than 3 seconds.
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