FAQ: Pyroelectric Flame Sensor - Advanced Detection with Precision
What is a Pyroelectric Flame Sensor?
A Pyroelectric Flame Sensor is an advanced device that utilizes lithium tantalate single crystals as its sensitive element. It detects flames by measuring the infrared radiation emitted by fire. Renowned for its high specific detectivity, this sensor delivers stable performance across a wide temperature range.
How does the Pyroelectric Flame Sensor work?
The sensor operates based on the pyroelectric effect, where the lithium tantalate crystal generates a voltage in response to temperature changes caused by infrared radiation from a flame. With a Curie temperature exceeding 600°C, this material ensures reliable operation in diverse environments.
What are the key features of the Pyroelectric Flame Sensor?
Narrow Detection Band: Operates at 4.48 µm, making it ideal for flame detection.
Compact Design: Housed in a TO-5 package, suitable for single-channel, voltage-mode operations.
Low Microphone Effect: Minimizes interference from sound.
Wide Field of View: Greater than 115°, allowing for extensive monitoring coverage.
High Detection Rate: Ensures quick response to flame presence.
Stable Spectral Response: Maintains accuracy in the wavelength range of 1-20 µm, crucial for reliable flame identification.
What are the typical applications of Pyroelectric Flame Sensors?
These sensors are extensively used in various settings, including:
Oil Storage Stations
Large Warehouses
Factory Workshops
Forests
Charging Stations
They are standard configurations in high-fire-risk areas such as petroleum, chemical plants, paper-making facilities, forests, and garages. Additionally, their popularity is growing in high-end residential, commercial, and general industrial applications.
What are the technical specifications of the sensor?
Window Size: 5.0 x 5.0 mm
Sensitive Element Size: 3 x 3 mm
Electrical Time Constant: 5 s
Thermal Time Constant: 200 ms
Operating Voltage: 2~15 V
Output Signal: 5.4 ±10% V
Field of View (FOV): >115°
Detection Distance: >35 m
Working Temperature Range: -40 to +85 °C
How can I ensure the sensor's longevity and accuracy?
To maintain optimal performance of the sensor:
Avoid exposing it to turbulent airflows and crosstalk to prevent false alarms.
Implement proper shock absorption and shielding due to its sensitivity to sound and electromagnetic interference.
Store the sensor in a dry environment and avoid mechanical pressure during installation.
Utilize electrostatic protection tools when handling the sensor to prevent damage from static electricity.
Is there any maintenance required for the sensor?
Minimal maintenance is needed; however, keeping the sensor window clean is essential. Avoid direct contact with hands or hard objects. If cleaning is necessary, use an alcohol-soaked cotton ball for gentle cleaning. Additionally, allow the sensor to stabilize to room temperature after handling or soldering to ensure accurate readings.
