长沙LPS-N7 Series Pressure Switch
● Multiple-channel digital output
● Supports display inversion
● Display pressure value directly on-site
● Supports delayed alarm
● Set action values with buttons
●330° Body Rotation
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Product Description
Product Overview Product overview
The LPS-N7 series electronic pressure switch is a next-generation, intelligent product capable of collecting pressure readings from on-site pipelines and pressure vessels. It features local display, switch-action output, and remote signal transmission, making it convenient for downstream control and data acquisition. The local switch control output comes in the form of dry-contact SPDT or PNP/NPN switching signals, while the analog output supports 4-20mA current signals. Compared to mechanical pressure switches, this model offers unparalleled convenience in adjusting setpoints. Additionally, it allows users to configure multiple alarm modes, including single-point alarms, as well as alarms triggered when the pressure falls within or exceeds preset upper and lower limits. This versatile product is widely used across various industries—such as petroleum, chemical processing, metallurgy, hydraulics, lubrication, and pharmaceuticals—where precise pressure control is essential.
Performance Metrics TECHNICAL PARAMETERS
Power supply: 18–32 VDC, typical value: 24 VDC
Measurement media: oil, water, gas, and other media compatible with stainless steel;
Measurement ranges: Negative pressure type: -0.1 to 0 MPa; Differential pressure type: 0–2 kPa; Positive pressure type: 0–60 MPa; (Custom options available for higher requirements)
Measurement accuracy: 0.25%FS; 0.5%FS (higher accuracy available upon request)
Overload Capacity: 2x Full-Scale Pressure:
Analog output: 4-20mA;
Switch outputs: 2-channel PNP/NPN switches;
Contact capacity: 250VAC, 3A / 24VDC 1.5A;
Load capability: Current type ≤ 500Ω, voltage type ≥ 250 kΩ;
Threaded connection: M20×1.5 (customizable based on site requirements);
Electrical interface: M12×1 connector;
Temperature Drift Coefficient: Within the specified operating temperature range, for every 10°C change in ambient temperature, the output variation is ≤ ±0.05% of the full scale; annual drift < ±0.3%.
Long-term stability: ±0.1%FS/year;
Housing material: Die-cast aluminum, epoxy resin coating, with sealing gasket
Housing Protection: IP65
Explosion-proof rating: Exd IIC T6Gb;
Operating temperature: -20～85°C
Storage temperature: -40～100°C
Relative humidity: 0–95% RH
External dimensions APPEARANCE OF SIZE
Installation Requirements INSTALLATION
1. The pressure switch can be directly installed onto the component being tested. To facilitate installation and maintenance, it is recommended to add a shut-off valve between the component and the pressure switch. In environments with significant vibration or impact, a flexible hose can be installed at the pressure switch connector to achieve mechanical decoupling.
2. A sealing ring should be installed between the pressure switch connector and the pipe fitting or shut-off valve. For flush-head pressure switches, the internal thread depth of the pipe fitting or shut-off valve must exceed 25 mm.
3. In general, the pressure switch should be installed vertically, facing upward relative to the horizontal surface. During installation, use a wrench to tighten the controller by turning it clockwise from the hexagonal nut at the bottom of the pressure switch.
4. When the range is less than 100 kPa, it must be installed vertically.
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