Siemens Compact Pressure Switches QPL
Siemens Compact Pressure Switches QPL Series are designed to monitor gas and air pressure in gas burner systems. Suitable for minimum and maximum pressure supervision, they feature adjustable switching points up to 50 kPa, automatic reset, and IP54 protection.
Product Details
Siemens Compact Pressure Switches QPL
Siemens Compact Pressure Switches QPL Series
Siemens Compact Pressure Switches QPL Series are compact pressure monitoring devices designed for gas and air pressure supervision in gas-fired equipment and industrial burner systems. They monitor pressure conditions and change the electrical contact state when the pressure falls below or exceeds the adjusted switching point.
The QPL Series can be used as minimum or maximum pressure switches and features automatic reset and adjustable switching points. These devices are suitable for integration into gas trains and combustion control systems requiring pressure monitoring.
Key Features
- Compact design for gas and air pressure monitoring
- Suitable for minimum and maximum pressure supervision
- Adjustable switching points for different pressure ranges
- Available pressure ranges covering 0.1-50 kPa
- Maximum continuous operating pressure of 72 kPa
- Automatic reset function
- IP54 degree of protection
- Horizontal or vertical mounting as specified
- O-ring and 1/4-inch threaded connection versions
- Designed in accordance with EN 1854 and EN 60730-2-6
Available Models
The Siemens QPL Series is available in two main connection versions:
- QPL15 Series: O-ring connection
- QPL25 Series: 1/4-inch threaded connection
Applications
- Industrial gas burner systems
- Gas train pressure monitoring
- Gas and air pressure supervision
- Combustion control systems
- Gas-fired equipment requiring pressure monitoring
Selection Guidelines
The appropriate pressure switch should be selected according to the required pressure range, gas medium, connection type, and burner control system specifications. Always verify the exact Siemens model number and technical requirements before installation.
Important: Installation, adjustment, and maintenance must be performed by qualified personnel in accordance with Siemens instructions and applicable safety regulations.
Technical Specifications
Siemens QPL Series Technical Specifications
| Brand | Siemens |
|---|---|
| Product Type | Compact Pressure Switch |
| Series | QPL15 / QPL25 |
| Application | Gas / Air Pressure Monitoring |
| Function | Minimum / Maximum Pressure Switch |
| Reset Function | Automatic Reset |
| Adjustable 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 (cos phi = 1) AC max. 2 A (cos phi = 0.6) DC max. 1 A |
| Operating Temperature | -15 to +60 °C |
| Storage Temperature | -20 to +80 °C |
| Relative Humidity | Less than 95% RH |
| Degree of Protection | IP54 |
| Safety Class | Class II |
| Switching Pressure Deviation | ±15% of scale setpoint |
| QPL15 Connection | O-ring |
| QPL25 Connection | 1/4-inch thread |
| QPL15 Weight | Approx. 155 g |
| QPL25 Weight | Approx. 143 g |
| Standards | EN 1854 / EN 60730-2-6 |
| Designed Lifetime | 50,000 burner startup cycles |
Model Pressure Ranges
| QPL15 Model | QPL25 Model | Pressure Range (kPa) | Switching Differential |
|---|---|---|---|
| QPL15.003B | QPL25.003B | 0.1-0.3 | 0.1 kPa |
| QPL15.010B | QPL25.010B | 0.2-1 | 0.15 kPa |
| QPL15.050B | QPL25.050B | 0.5-5 | 0.3 kPa |
| QPL15.150B | QPL25.150B | 0.5-15 | 0.6 kPa |
| QPL15.500B | QPL25.500B | 10-50 | 2.5 kPa |
Note: Technical specifications and pressure ranges vary by model. Refer to Siemens Datasheet CC1N7221en for detailed product information.
Dimensions
Documents & Downloads
Frequently Asked Questions
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