Punp suction Portable ozone sensor detector
Model: HNAG920
Sampling Method: Pumping Suction and Diffusion
Detection Principle:Electrochemistry
Gas: ozone (O3)
Range: 0-50PPM,0-100PPM.
Resolution: 0.01PPM,0.1PPM.
Accuracy: ≤±2% F.S.
Product Description
● Equipped with a 32-bit microprocessor and high-speed, high-precision processing circuitry for fast and accurate measurements.
● Features an external USB port for data export and deletion via USB cable connection to a computer.
● Supports up to 5 different sensors for flexible detection.
● Built-in buttons for easy parameter viewing and configuration.
● Allows unit switching (e.g., ppm ↔ mg/m³) through coefficient adjustment.
● Customizable historical data storage intervals.
● Supports Chinese/English language display switching.
● Fall alarm / one-touch emergency alarm function.
● 180° auto-rotating screen.
● Temperature & humidity compensation.
● PC+TPU (rubber overmolding process) for impact resistance.
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Gas Detection Q&A
1. On Calibration and Accuracy
Q: Why do detectors need regular calibration?
A: Sensors experience "drift" over time, leading to inaccurate readings. Regular calibration (typically recommended every 6 months or 1 year) is necessary to ensure data accuracy and compliance with regulatory requirements.
Q: What is the difference between zero calibration and span calibration?
A: Zero calibration adjusts the reading to zero in clean air to eliminate background interference; span calibration uses ozone gas of a standard concentration to verify the instrument's linear response, ensuring accuracy at high concentrations.
2. On Readings and Anomalies
Q: The instrument reading consistently shows "0" or extremely low values. Is it broken?
A: Not necessarily. First, check if the sensor is within its validity period (typically 1-2 years). Readings become invalid if the sensor has expired. Second, check if the "auto-zero" function is enabled, as it may automatically deduct background values at low concentrations.
Q: What should I do if the reading suddenly spikes or shows severe fluctuations?
A: Ensure your own safety first and quickly evacuate to a ventilated area. A spike could indicate a genuine high-concentration leak, or it could be due to sensor moisture, poisoning (exposure to high concentrations of interfering gases), or circuit failure. It is recommended to immediately cross-verify with another instrument.
3. On Maintenance and Care
Q: How often does the sensor need to be replaced?
A: The lifespan of electrochemical sensors is typically 2-3 years. Actual lifespan depends on the ozone concentration and temperature/humidity in the operating environment, as high-concentration environments accelerate sensor aging.
Q: How should I clean and store the instrument?
A: Use a soft, damp cloth to wipe the exterior. Do not use organic solvents (e.g., alcohol, acetone) to clean the sensor area. Store the instrument in a dry, cool place, avoiding direct sunlight and extreme temperatures.
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