What is a Contact Manometer? Working Principle, Usage Areas and Technical Details
What is a Contact Manometer? Working Principle, Usage Areas and Technical Details
What is a Contact Manometer? Working Principle, Usage Areas and Technical Details
Pressure is one of the most critical parameters in hydraulic and pneumatic systems. Continuous monitoring of this pressure and keeping it within specified limits is of great importance for both safety and efficiency. Contact manometers not only measure pressure but also generate an electrical signal when the specified pressure value is reached, allowing them to automatically control the system.
What is a Contact Manometer?
Contact manometer is a measuring device with an electrical contact mechanism in addition to classical manometers. When the measured pressure value reaches the minimum and maximum limit values set on the pressure gauge, the contact mechanism is activated. Thus, a relay, alarm, pump or valve can be automatically triggered in the system.
This feature has made the contact manometer indispensable, especially in hydraulic power units, compressors, pump protection, and industrial automation applications.
Working Principle
Contact manometers generally work according to the Bourdon tube principle. The pressure causes the Bourdon tube to flex, and this movement is mechanically transferred to the needle. In contact versions, the electrical switch (micro switch or magnetic contact) is activated when the needle reaches the specified value.
- Lower contact (min.): Generates a signal when the pressure drops below the specified lower value.
- Upper contact (max.): Generates a signal when the pressure reaches the specified upper value.
- Dual contact models: Provides control for both minimum and maximum values.
Advantages of Contact Manometers
- Dual Function: Provides both measurement and control function at the same time.
- Safety: Triggers an alarm or protection circuit when the system pressure exceeds critical values.
- Energy Efficiency: Saves energy by preventing unnecessary operation of pumps and compressors.
- Flexible Use: It can be produced with different pressure ranges and sensitivity levels.
Uses
Contact manometers are widely used in many industrial areas:
- Hydraulic systems: Pump protection, overpressure safety
- Pneumatic systems: Compressor start-up control
- Water and steam installations: Pressure alarm and safety systems
- Chemical and petrochemical: Pressure control for safe operation in hazardous environments
- Energy sector: Pressure monitoring in generator and turbine systems
Technical Specifications
Contact manometers are produced with different technical specifications according to the application needs:
- Measuring Range: 0... From 1 bar to 0... Options up to 1000 bar
- Contact Types: Mechanical contact, magnetic contact, reed contact
- Accuracy: ±1% to ±2.5%
- Dial Diameter: 63 mm, 100 mm, 160 mm
- Operating Environment: Temperature range from -20 °C to +60 °C
- Connection Type: Bottom connection, rear connection, radial connection
Contact Manometer Solutions with Hidroman
Hidroman offers different contact manometer solutions suitable for industrial needs. The products offered by Hidroman to increase system safety, activate automatic control mechanisms and provide energy efficiency; It stands out with its quality, durability and long-lasting use.
Frequently Asked Questions (FAQs) About Contact Manometers
- What is a contact manometer?
A contact manometer is a pressure measuring device with an electrical contact mechanism in addition to the classical manometer. When the pressure reaches the specified minimum or maximum value, it sends an electrical signal, allowing the system to be controlled automatically. - What is the difference between a contact manometer and a regular manometer?
While a normal pressure gauge only shows the pressure visually, a contact pressure gauge can also activate equipment such as relays, pumps, valves or alarms when the pressure reaches the specified value. - In which systems are contact manometers used?
- Pump protection and pressure control in hydraulic systems
- Automatic commissioning-discharging of compressors
- Pressure safety in water and steam installations
- Alarm systems in the chemical, petrochemical and energy sectors
- How does a contact manometer work?With the
principle of the Bourdon tube, it converts pressure into mechanical motion. When the pressure needle reaches the set contact value, it triggers the electrical switch and sends a signal to the connected device. - What is a double contact pressure gauge?
Double contact manometers are models that can generate signals separately for both minimum and maximum pressure values. Thus, it protects the system in both low and high pressure situations. - What is the precision of contact pressure gauges?
It usually has a sensitivity value of 1±% to 2.5% ±. High-precision models should be preferred in systems that require critical measurements. - What to consider when choosing a contact manometer?
- Measurement range (maximum pressure of the system)
- Contact type (mechanical, magnetic, or reed contact)
- The medium to be used (temperature, vibration, liquid or gas pressure)
- Connection type (bottom connection, rear connection)
- Sensitivity class
- What happens if the contact pressure gauge fails?
In the event of a malfunction, the system pressure may remain uncontrolled. For this reason, regular maintenance should be performed, especially the cleanliness and sensitivity of the contacts should be checked. - What advantages do Hidroman contact manometer solutions offer?
Hidroman is a reliable choice in the field of contact manometers with its wide range of products suitable for industrial needs, high quality standards and long-lasting solutions.
Result
Contact manometers play a critical role in the safety and efficiency of industrial systems by not only monitoring but also automatic control of pressure. In hydraulic, pneumatic, water and energy applications, a correctly selected contact manometer both increases system safety and reduces maintenance costs.