PRESSURE SWITCH
A pressure switch is a control device that runs a switch on or switch-off action when a preset pressure value occurs. LEFOO pressure switchare mainly used as the flow controller for fluid or gas in applications such as HVAC systems, water pumps, boilers, gas tanks.
Digital Pressure Switch
Pressure Range: -100~100kpa
Pressure Accuracy: 1%FSO
Work Temperature: 0~50 °C
Measure media: Non-corrosive dry gas
Output: digital 4~20ma/1~5V, Swith NPN /PNP
Air Compressor Pressure Switch
Pressure Range: 15~60psi / 40~250psi / 400~500 psi
Stable and accurate pressure switching
Rare metal parts, durable quality
Optimal for heavy duty commercial air compressors
Robust structure for industrial harsh conditions
Differential Pressure Switch
Various Pressure Ranges: 20pa~10000pa
Robust plastic structure
Capable highly customized
Simple installation, easy to adjust
Long service life, accurate and stable
Water Pump Pressure Switch
Pressure Range: 1.5~12.5kgf/square cm
Water-Resistant
Long electrical serve life
High-Pressure Accuracy Switching
Various interfaces and connections
Pressure Gauge LFB
Things you need to know about LEFOO pressure gauge LFB series
Mechanical Pressure Switch
Range: 0.2~45Bar(LF08) / 0.5~250 Psi(LF20)
Compact structure,Adjustable Pressure
Good durability: Optional IP67 protection
Multiple series, various connector wiring harness
Suitable for most media and complex working sites
Water Controller
Pressure Range: 1.5~10 Bar
Max current:8A
Compact size, Easy to install
Stable and accurate performance, noiseless
Energy-saving and environmental protection
Water Pressure Switch
(LF40H)Cut in and off Pressure: 1.5bar / 2.5bar
(LF40L) Cut in and off Pressure: 0.1 / 0.2 bar
Good working stability
Excellent durability and pressure resistance
Water supply pressure control for the water purifier
HVAC Pressure Switch
Pressure Range: <16Bar~47Bar
Adjustable Pressure Setting
One-piece interface welded bellows element
Fast rebound function, Low abrasion and Durable
High reliability electrical & mechanical performance
Boiler Pressure Switch
Pressure range: 5-50 psi
Small hysteresis quantity
For boiler system and oil pressure system
316L steel diaphragm, capable of most media
Transparent visual cover, adjustable pressure/scale
Water Solenoid Valve
MECHANICAL PRESSURE SWITCH
A mechanical adjustable pressure switch applies a spring-triggered piston sealed by a diaphragm and rubber O ring. Generally, The spring is the opposing force to the inlet pressure and the spring's pretension is adjusted with a male stud screw by a female screwdriver. People preset a targeted high pressure on the male-threaded stud inside the pressure switch which is subjected to trigger the off switch, and a preset low-pressure value to trigger the switch. For example, in the hot pipeline of an HVAC system, when the compressed high-temperature high-pressure air comes and the pressure rises to an exact value which will trigger the off switch, the spring pretension directly correlates to the pressure at which the switch makes an electric contact. When the pressure drops, the switch resets to its original state and turns on the switch. The low-pressure switch and the high-pressure switch in the HVAC system are two types of basic refrigeration switches in a typical high-taste residential system.
The mechanical pressure switch is better suited for handling high voltages and amperages than an electronic pressure switch. They can be used to make a contact change for an increase or decrease in pressure.
Common applications of the mechanical pressure switch
HVAC, air compressor blowers, gas cylinders, air pumps, generator sets, off-road vehicles, compressors, wafer ovens, process equipment, flow control devices, pumps, wastewater, heating and cooling systems, and numerous other applications from LEFOO pressure controlacross industries.
Electronic pressure switches
An electronic pressure switch is controlled by the charging signal generated from a pressure sensor, Which is proportional to the pressure. Thus, not only is it identified whether the defined switch point has been reached, but the actual measured pressure is transmitted. Electronic pressure switches often feature a display from which the measured pressure can be read, digital displays and switching buttons also offer adjustable settings. Switch points, pressure output signals can be individually adjusted to suit the remote monitor control application.
The pros of electronic pressure switches are precise measurement, intelligent remote controllable, The con is the price is much higher than mechanical pressure switch and not suitable for extremely high-temperature high-pressure measurement and applications.
Pressure: It must be able to withstand the maximum working pressure. A diaphragm design works well for vacuum and low-pressure applications. For high-pressure applications, use a piston design.
Temperature: It must be able to work well within its maximum and minimum temperature range.
Repeatability: Repeatability, or accuracy, is the ability of the device to accurately switch back to the same set point for every repetition. The range of accuracy required will determine the selection of the pressure switch for your application. Diaphragm designs generally provide more accuracy than piston designs.
Electronic pressure switches are suitable for automated and controlled equipment systems that require programmable function, digital display, flexibility, accuracy, ingress protection, and stability. Common media used with pressure switches are Hydraulic oil, Heating oil, Turpentine, Petrol/gasoline, Air. The automatic pump control switch for water pump applied to the water system will automatically start and stop the water pump according to the set pressure value.
LEFOO PRESSURE SWITCH
The Lefoo group was launched in 2000, Lefoo manufacture pressure switches for an extensive range of industries include -10000 pa to 10000 pa, and from 0~200 bar. Such as HVAC, refrigeration, air, compressor and pump pressure, automatic water pump, vacuum, steam, differential pressure, float, miniature and vacuum, high pressure, level, and digital switches and sensors to meet the utmost needs of industrial application and harsh environment. Each LEFOO pressure switch is high accuracy with numerous pressure ranges, flexible for any connections.
If you need any kinds of differential pressure transducer, please contact us, as a professional pressure switch manufacturer, LEFOO is willing to offer you high quality products.
在线联系供应商
Other supplier products
 |
LEFOO BRUSHLESS RO BOOSTER PUMP | This brushless RO booster pump series is powered by a permanent magnet brushless motor, 0.5/0.7 Mpa pressure feeding,42~45db noise level, adjustabl... |
 |
PRESSURE SENSOR TRANSMITTER | PRESSURE SENSOR TRANSMITTER A pressure sensor is an instrument consisting of a pressure-sensitive element to monitoring the actual pressure and c... |
 |
BOOSTER PUMP BRUSHLESS LEFOO | LEFOO was founded in 1995, over the past 25 years LEFOO has grown to one of theprofessional peristaltic pump manufacturersthat has 3 subsidiaries w... |
 |
Lefoo Oil-filled Diffusion Silicon Pressure Transmitter LFT2800 | LEFOO LFT2800 pressure transmitter is widely used in the measurement of fluid medium pressure in test systems such as fire protection, water treatm... |
 |
DIFFERENTIAL PRESSURE PRODUCTS | LEFOO differential pressure transmitter at the pressure ranges of 0～±100Pa, 0～±1,000Pa, and 0～±10,000Pa.LCD digital display 25... |
Same products
 |
蔓越橘提取物 | 卖方: 永州菁木生物科技有限公司 | 蔓越莓主要生长在北美，含有独特的原花青素，可以防止细菌（尤其是大肠杆菌）粘附在身体细胞上，从而降低感染风险。它们还可以改善动脉粥样硬化，增强心血管健康。蔓越莓富含维生素 C、铁、抗氧化剂和原花青... |
 |
水飞蓟提取物 | 卖方: 永州菁木生物科技有限公司 | 奶蓟草，也称为水飞草或水飞蓟，是一种菊科植物，其药用历史已有 2000 多年。它的名字来源于其压碎的叶子的乳白色汁液。其提取物富含水飞蓟素、水飞蓟宾、黄酮类化合物和其他抗氧化剂，可对抗自由基、增... |
 |
槐米提取物 | 卖方: 永州菁木生物科技有限公司 | 槐米提取物源自中国、日本、韩国和越南盛行的槐树花，富含芦丁和槲皮素等黄酮类化合物。这些黄酮类化合物具有有效的抗氧化、抗炎和血管保护特性。因此，该提取物广泛用于传统医学和保健品中，以增强心血管健康... |
 |
人参提取物 | 卖方: 永州菁木生物科技有限公司 | 人参提取物是从五加科植物人参的根、茎、叶中精心提取和精制而成。该提取物富含18种人参单体皂苷，可溶于80°C的水，易溶于乙醇。人参的使用已有数百年历史，人参皂苷是其研究最广泛的活性成分之... |
 |
银杏叶提取物 | 卖方: 永州菁木生物科技有限公司 | 银杏叶提取物 (GBE) 是从银杏树的叶子中提取的，银杏树在中国的药用历史已有数百年历史。该提取物包含银杏叶总黄酮、银杏内酯和其他活性物质。 GBE具有多种健康功效，包括扩张血管、保护血管内皮组... |
