Description
Digital Pressure Switch PNP & 4–20mA – DPS201
Precision Digital Vacuum & Low-Pressure Monitoring
The DPS201 is a compact digital pressure switch and sensor designed for accurate monitoring and control of vacuum, low-pressure compressed air and non-corrosive gas systems.
Combining a **PNP open-collector switching output** with a **4–20mA analogue signal**, the DPS201 provides automatic pressure-dependent switching and continuous pressure feedback from a single electronic device.
With a measurement and setting range of **-100 to +100 kPa (-1 to +1 Bar)**, the DPS201 is particularly suitable for applications requiring precise vacuum detection, low-pressure monitoring and pneumatic system control.
Its dual LCD display, adjustable switching functions, selectable response times and compact 30 × 30mm housing make it ideal for industrial automation, OEM machinery, vacuum handling equipment and laboratory applications.
Pressure Measurement & Performance
Pressure Range: -100 to +100 kPa (-1 to +1 Bar)
Pressure Setting Range: -100 to +100 kPa
Maximum Applied Pressure: 500 kPa (5 Bar)
Measurement Accuracy: ±2% F.S. at 25°C
Temperature Accuracy: ±3% F.S. from 0°C to +50°C
Response Time: Adjustable from 2.5 to 2000ms
The DPS201 monitors both negative and positive pressure, making it suitable for vacuum circuits and low-pressure pneumatic systems.
Its adjustable response time helps reduce unwanted switching caused by temporary pressure fluctuations.
PNP Switching & 4–20mA Analogue Output
The DPS201 combines electronic pressure switching with continuous analogue pressure measurement for integration into compatible PLCs, monitoring equipment and industrial control systems.
PNP Switching Output**
Output Type: PNP open collector
Maximum Switching Current: 80mA
Maximum Voltage Drop: 1V
Short-Circuit Protection: Included
Analogue Output**
Signal: 4–20mA
Load Resistance: 400Ω
The PNP output can be configured for pressure-dependent switching, alarms or automated control, while the 4–20mA output provides continuous pressure feedback.
This combination allows the DPS201 to perform the functions of both a digital pressure switch and an analogue pressure sensor.
Digital Display & Adjustable Control
The dual LCD display provides clear indication of pressure measurements, operating settings and output status.
Display: Dual LCD
Measurement Display: Four-digit pressure indication
Display Functions: Pressure value, measurement units and output status
Backlight: Adjustable
Display Groups: Four
Switching Modes: Hysteresis and upper/lower limit comparison
The programmable switching functions allow pressure thresholds to be configured for different applications, including vacuum detection, pressure monitoring and automatic equipment control.
Electrical Specification
Supply Voltage: 12–24V DC ±10%
Power Consumption: 40mA maximum without load
Switching Output: PNP open collector
Maximum Output Current: 80mA
Maximum Output Voltage Drop: 1V
Analogue Output: 4–20mA
Analogue Load Resistance: 400Ω
Short-Circuit Protection: Yes
Selectable Response Times
2.5ms, 20ms, 100ms, 500ms, 1000ms or 2000ms
Fast response settings are useful for applications requiring rapid pressure detection, while longer settings help prevent unnecessary switching caused by brief pressure fluctuations.
Pressure Connections & Installation
External Pressure Connection: 1/8" BSP
Internal Pressure Connection: M5
Optional Threads: NPT or Rc
Dimensions: 30 × 30 × 43mm
The compact housing is suitable for installation on machinery, pneumatic equipment and within control panels where space is limited.
Supplied Mounting Accessories
✓ Panel mounting adaptor
✓ Protective shield
✓ L-type mounting bracket
✓ S-type mounting bracket
✓ Fixing screws
✓ 2-metre connection cable and plug
Media Compatibility
Suitable for non-flammable, non-corrosive gases, including compatible compressed air.
The DPS201 is designed for pneumatic and gas pressure measurement and should not be used with liquids, corrosive gases or flammable media unless specifically approved by the manufacturer.
Environmental & Operating Conditions
Ambient Temperature: 0°C to +50°C
Storage Temperature: -20°C to +60°C
Operating Humidity: 35–80% RH
Protection Rating: IP40
Shock Resistance: 100m/s², three times in six directions
Vibration Resistance: 1.5mm amplitude, 10–500Hz, two hours per X, Y and Z axis
The IP40 housing is intended for installation in protected industrial environments and is not suitable for direct exposure to water spray or washdown conditions.
Typical Applications
✓ Vacuum pressure monitoring
✓ Vacuum gripping and handling
✓ Low-pressure compressed air systems
✓ Pneumatic automation equipment
✓ PLC pressure monitoring
✓ Industrial machinery control
✓ Pressure alarms and switching
✓ Laboratory and test equipment
✓ OEM pneumatic machinery
✓ Non-corrosive gas pressure control
Why Choose the DPS201?
The DPS201 provides precise vacuum and low-pressure monitoring with the flexibility of both PNP switching and 4–20mA analogue output.
Its programmable pressure thresholds, selectable response times and clear digital display make it suitable for a wide range of industrial automation and pneumatic control applications.
For applications requiring measurement from **-1 to +1 Bar**, the DPS201 offers a compact alternative to separate pressure switches and analogue transmitters.
For higher positive pressure applications, the DPS210GB-NS provides an extended measurement range up to +10 Bar.
Free next day UK delivery.
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