Acetylene gas leak alarm

The bus-type gas alarm detector supports two power supply buses and 485 bus. It can collect a variety of combustible gases and harmful gases, and provide escort for safe production; it can be widely used in chemical companies, power plants and gas production companies; steel mills, Detection and alarm of flammable and explosive combustible or harmful gases such as pharmaceutical factories and food factories.
This product uses a digital tube display, supports sound and light alarm deng, high-precision sensor sampling, supports 24V, 220V power supply, power supply two buses, it is a cost-effective product;
Product features ● Imported electrochemical sensor
● Up to 24-bit fully differential ADC sampling
● Local human-computer interaction, LED display
● Support RS485, two-bus communication with power supply ● Support standard ModBUS protocol ● Intrinsically safe circuit, safety explosion-proof ● Support local sound and light alarm ● Support one-way alarm switch signal output application ● Industrial automation: alarm through RS-485 bus and power supply bus The host composes the GDS system;
●Commercial application: shops or restaurants along the street, and catering occasions that use gas;
●Industrial safety monitoring: monitoring of combustible and toxic and harmful gases in steel mills, chemical plants, biology, pharmaceuticals, gas stations, gas stations, gas companies, food plants, and power plants;
Product performance detection gas Combustible gas, toxic and harmful gas sensor type Imported catalytic combustion sensor, electrochemical sensor, semiconductor, infrared measurement range 0-100%LEL (flammable)
way of communication Power supply two bus, 485 bus, 4-20MA
Operating Voltage DC36V±15%
Whole machine power consumption ≤1W
Display method LED digital display error ≤±5% FS (Higher accuracy requirements are based on sensor performance)
Repeatability ≤±2%
Response time Catalytic combustion type T90＜30s
Electrochemical, semiconductor T90＜60s Infrared T90＜90s
Recovery Time ≤30 seconds (higher requirements are based on sensor performance)
Operating temperature -40℃～+70℃
Working humidity ≤95%RH
Application standard GB15322.1-2019
Installation method Wall-mounted installation cable RVS 2×2.5mm2
Transmission distance 800M
shell material Die-cast aluminum alloy, electrostatic spray, waterproof and explosion-proof grade Exd II C T6 Gb

High Precision Machining

High Precision Machining is defined as a process of changing the dimensions or the performance of workpiece with machining facilities.

According to the temperature of the workpiece while in machining, high precision machining can be divided into cold working and hot working. Usually, machining under indoor temperature, and won't change cause chemical change or phisical phase change is named cold working. On the other hand, if under temperature, higher or lower than room temperature, which will lead to chemical changes or phase changes, it will be called as hot working.

For high precision machining, the machining tolerance can be up to 0.0001-0.001mm, the surface finish Ra can be 0.02-0.1um.

Machining precision is to describe the actual geometrical parameter of the part after machining, such as the size, the form, the position, comparing with the theoretical geometry parameter. The difference from these two parameters is the machining tolerance. The number of the difference show the machining accuracy, the bigger, the lower of the machining precision, the smaller, the higher machining precision.

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