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LPS-C3 Series Differential Pressure Switch
● Fully welded diaphragm, zero leakage
●Mechanical principle, no power supply required
● High-quality microswitch with minimal dead zone
● The process interface is versatile, and both flange and threaded connections can be customized.
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Product Description
Product Overview Product overview
The LPS-C3 series differential pressure switches feature a diaphragm-type differential pressure sensing element. The standard version is suitable for controlling the pressure difference between the same or different pressure sources involving non-corrosive gases, liquids, or steam. The explosion-proof model, meanwhile, can be used to monitor pressure differences in environments containing Class IIA/IIB/IIC explosive gas mixtures (groups T1–T6), provided the medium poses no corrosive threat to the sensing element. Featuring a fully welded stainless steel diaphragm design, these switches are simple and easy to use, with minimal failure points. They effectively prevent leakage and false operations. Additionally, the setpoint is adjustable, requiring no separate power supply, and they boast high contact capacity—making them exceptionally convenient for on-site applications. This makes them widely applicable across various industries, including petroleum, chemical processing, metallurgy, power generation, sugar production, pharmaceuticals, and more, where differential pressure control is essential.
Measurement Principle Principle
The diaphragm-type pressure switch is a mechanical pressure switch that uses the mechanical deformation of a diaphragm to control the closing or opening of electrical contacts. When the pressure of the measured medium changes, the diaphragm undergoes corresponding displacement. This displacement is then transmitted via a linkage mechanism to a microswitch. Once the displacement reaches a preset value, it actuates the microswitch, causing its contacts to either close or open—thus signaling the pressure level. Additionally, adjustable pressure switches allow users to fine-tune the relationship between the linkage mechanism and the microswitch contact travel, enabling precise pressure control at either a fixed value or within a specific range, ultimately achieving the desired control objective.
Performance Metrics TECHNICAL PARAMETERS
Measurement medium: Gas or liquid (For highly corrosive applications, please consult us).
Measurement range: 0–2.0 to 2500 kPa
Working viscosity: ≤10E3 m²/s
Housing material: Die-cast aluminum, epoxy resin coating, with a sealing gasket on the outer cover
NEMA Protection Rating: Meets NEMA 4X requirements
Set value accuracy: ±0.5%
Repeatability accuracy: <1%
Pressure interface: Standard 1/2 NPTF female thread, M20×1.5 male thread; custom interfaces available upon request.
Electrical interface: M20×1.5 internal thread; special interfaces available upon request
Switch output: One single-pole double-throw (normally open + normally closed) output;
Switching component: Microswitch
Ambient temperature: -40°C to +70°C
Environmental humidity: 5%–95%
Cycle Life: 1 million cycles
Protection Rating: IP67
Explosion-proof rating: Exde IIC T6 Gb
Dust Explosion Protection: ExtD A21 IP66 T80℃;
Contact capacity: Standard type: 380V, 15A; Explosion-proof type: 380VAC, 5A;
External dimensions APPEARANCE OF SIZE
Installation Requirements INSTALLATION
1. Weld the pressure-tapping pipe, and it’s best to install a shut-off valve on the pipe. Leave threaded connections corresponding to the switch, allowing for easy removal of the switch during maintenance.
2. Install the switch in a location with minimal vibration and temperature fluctuations. An appropriate installation spot can effectively prevent moisture from entering the housing. If the switch will be installed under harsh operating conditions, it must be mounted vertically (with the pressure connector facing downward). Please avoid installing it in environments outside the specified temperature range.
3. Special note: When installing or removing, never directly twist the outer casing to secure or detach the switch. Instead, use a wrench to tighten (or loosen) the connecting hexagonal (or flat) fitting at the joint.
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