Siemens Pressure Switches QPLx5
Siemens Pressure Switches QPLx5 Series are compact gas and air pressure switches designed for burner and combustion control systems. They support minimum or maximum pressure monitoring, adjustable pressure ranges up to 50 kPa, automatic reset, and IP54 protection.
Product Details
Siemens Pressure Switches QPLx5
Siemens Pressure Switches QPLx5 Series
Siemens Pressure Switches QPLx5 are compact pressure monitoring devices designed to supervise gas or air pressure in industrial gas burners and gas train systems. When the monitored pressure falls below or rises above the adjusted switching point, the electrical contacts change state, providing a switching signal to the connected burner control system.
The QPLx5 series supports both minimum and maximum pressure monitoring applications. Featuring adjustable switching points, automatic reset, and a compact design, these pressure switches are suitable for integration into industrial combustion equipment and gas control systems.
Key Features
- Compact pressure switches for gas and air monitoring
- Suitable for minimum and maximum pressure supervision
- Adjustable switching points
- Working pressure ranges from 0.1 to 50 kPa, depending on model
- Maximum continuous operating pressure of 72 kPa
- Automatic reset function
- IP54 degree of protection
- Durable plastic housing with die-cast aluminum base
- Available with O-ring or Rp 1/4" threaded connection
- Designed in accordance with EN 1854 and EN 60730-2-6
Applications
- Industrial Gas Burners
- Combustion Control Systems
- Gas Pressure Monitoring
- Air Pressure Monitoring
- Gas Train Systems
- Boiler Burner Systems
- Industrial Heating Equipment
Available Models
Siemens QPL15 Series: Compact pressure switches featuring an O-ring connection for installation on compatible gas valve assemblies. Available in various adjustable pressure ranges.
Siemens QPL25 Series: Compact pressure switches equipped with an Rp 1/4" threaded connection for compatible gas pressure monitoring installations.
Operating Principle
Siemens QPLx5 pressure switches monitor gas or air pressure and change the state of their NO/NC electrical contacts when the monitored pressure crosses the selected switching point. The contact configuration can be used for minimum or maximum pressure monitoring, depending on the connected control circuit.
Product Selection
When selecting a Siemens QPLx5 pressure switch, consider the required pressure range, gas compatibility, connection type, electrical ratings, and burner control requirements. Always verify the exact product model against the official Siemens technical documentation.
Technical Specifications
Siemens QPLx5 Technical Specifications
| Brand | Siemens |
|---|---|
| Product Type | Compact Pressure Switch |
| Series | QPL15 / QPL25 / QPLx5.xxxB |
| Application | Gas and Air Pressure Monitoring |
| Adjustable Working Pressure Range | 0.1–50 kPa (model-dependent) |
| Maximum Continuous Operating Pressure | 72 kPa |
| Switching Voltage | AC max. 250 V / DC 24–48 V |
| Switching Current |
AC max. 6 A at cos φ = 1 AC max. 2 A at cos φ = 0.6 AC min. 20 mA DC max. 1 A / min. 20 mA |
| Electrical Contacts | COM / NO / NC |
| Reset Function | Automatic Reset |
| Degree of Protection | IP54 |
| Safety Class | Class II according to EN 60730-1:2016 |
| Switching Pressure Deviation | ±15% of setpoint under specified test conditions |
| Operating Temperature | -15 to +60 °C |
| Storage / Transport Temperature | -20 to +80 °C |
| Relative Humidity | Less than 95% RH (non-condensing) |
| Installation Altitude | Maximum 2,000 m above sea level |
| Weight - QPL15 | Approx. 155 g |
| Weight - QPL25 | Approx. 143 g |
| Applicable Standards | EN 1854 / EN 60730-2-6 |
Siemens QPL15 and QPL25 Model Comparison
| QPL15 Model | QPL25 Model | Pressure Range (kPa) | Switching Differential | Factory Setting |
|---|---|---|---|---|
| QPL15.003B | QPL25.003B | 0.1–0.3 | 0.1 kPa | 0.1 kPa |
| QPL15.010B | QPL25.010B | 0.2–1 | 0.15 kPa | 0.2 kPa |
| QPL15.050B | QPL25.050B | 0.5–5 | 0.3 kPa | 0.5 kPa |
| QPL15.150B | QPL25.150B | 0.5–15 | 0.6 kPa | 1 kPa |
| QPL15.500B | QPL25.500B | 10–50 | 2.5 kPa | 10 kPa |
Connection Types
- QPL15: O-Ring Connection
- QPL25: Rp 1/4" Thread Connection
- Optional Accessory: AGA65 Contact Box (ordered separately)
Note: Specifications and pressure ranges vary by model. Refer to the official Siemens Data Sheet CC1N7221en before ordering or installation.
Dimensions
Documents & Downloads
Frequently Asked Questions
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