What is Namur type proximity sensor?
Answer: A NAMUR sensor is a 2-wire proximity sensor that is usually powered by 8 VDC. When the sensor detects the target, the current flow through the sensor drops to less than 1.2 mA. When the target moves away from the sensor and is not detected, the current flow increases to above 2.1 mA.
What are the different types of proximity sensors?
According with the non contact object detection method, there are five types of proximity sensor….They are,
- Inductive Proximity Sensor.
- Optical Proximity Sensor.
- Capacitive Proximity Sensor.
- Magnetic Proximity Sensor.
- Ultrasonic proximity Sensor.
How do you sense distance?
The Ultrasonic Sensor is arguably the most common distance measuring sensor, also known as the Sonar sensor. It detects the distance to objects by emitting high-frequency sound waves.
How does a 2 wire inductive sensor work?
2 wire DC: These sensors contain an output amplifier with the function N.O. or N.C. that can pilot a load connected in series. In this system a residual current flows through the load even when in the open state and a voltage drop occurs to the sensor when it is in the closed state.
What is NAMUR connection?
NAMUR is an acronym for the User Association of Automation Technology in Process Industries, which provides an industry-wide standard for automated valve technology. A NAMUR non-amplified sensor supplies two different signal levels, depending on the switch state.
What NAMUR compliant?
NAMUR-compliant transmitters are designed to limit their output signals between 3.8 mA and less than 21 mA when functioning properly. NAMUR-compliant control systems will recognize these errant milliamp values as fault states, and may be programmed to take specific action upon receiving these signal values.
Do you treat a Namur sensor like a standard sensor?
But do not confuse the wiring connections between these two types of sensors. On the inside, NAMUR sensors have different circuitry than standard 2-wire DC sensors and need special treatment. Due to approvals required for hazardous environments, intrinsically safe sensor configurations require a NAMUR output sensor and an intrinsic safety barrier.
Why are Namur proximity sensors used in hazardous locations?
In a nutshell, NAMUR proximity sensors were developed to ensure safety in hazardous locations. NAMUR proximity sensors are used in classified hazardous location areas that have explosive gas, dust, or fibers present. NAMUR proximity sensors are considered Intrinsically Safe.
Why do you need a Namur switch isolator?
NAMUR sensors and switch isolators are highly reliable and have proven-in-use characteristics, making them a perfect choice for safety-related applications when connected to suitable control circuits.
What does Namur stand for in chemical industry?
First, some information about NAMUR. NAMUR is a German acronym for (normenarbeitsgemeinschaft für Mess- und Regeltechnik in der Chemischen Industrie). This translates to: Standardization Association for Measurement and Control in Chemical Industries.