Overview
The BH-90A-NO2 is a Portable single gas detector launched by the BOSEAN brand, dedicated to the detection of nitrogen dioxide (NO2) gas. The instrument adopts mainstream 8-bit micro-control technology, with the characteristics of fast Response speed, high Measurement accuracy, Stability and Repeatability, and simple operation. Its small size, high-strength ABS material, high waterproof performance with IP65 protection level, and equipped with sound, light and vibration three-level alarm function, safe and reliable. Built-in 3.7V rechargeable lithium battery, can work continuously for more than 10 hours.
Features
1. Industrial Sensor with High Sensitivity.
2. Mainstream 8-bit micro-control technology, stable performance.
3. The fuselage is compact and easy to operate.
4. With IP65 protection level, good waterproof performance.
5. Long standby time, continuous operation for more than 10 hours (gas can be used for no less than 7 hours).
6. Equipped with three alarm functions of sound, light and vibration, it is not easy to ignore.
7. High and low alarm values can be set.
8. Supports more than 30 types of Sensors, and can flexibly configure customized gases according to customer needs.
Principle
The Portable Gas detector uses the diffusion Sampling method. The target gas (nitrogen dioxide) in the environment naturally diffuses through the air inlet of the instrument housing into the Sensor gas chamber. The Sensor (electrochemistry or specific principle Sensor according to the model) reacts with the gas to generate an electrical signal proportional to the gas concentration. The signal is processed by the instrument's microcontroller, and finally the gas concentration value is displayed in real time on the 1.77 inch high definition screen. When the concentration exceeds the preset high or low alarm value, the instrument will trigger an acoustic, optical and vibration alarm.
Applications
Petrochemicals, environment monitoring, municipal gas, emergency rescue, industrial production safety, confined space operation
Standards
GB3836.1-2010、GB3836.4-2010、GB15322.3-2003、JJG693-2011、JJG365-2008、JJG695-2003、JJG915-2008
Steps
1. Power on: Press the power button for a long time to start the instrument, and wait for the self-test and warm-up to complete.
2. Detection: Place the instrument in the environment to be tested and observe the real-time gas concentration displayed on the screen.
3. Alarm settings: In the settings menu, set high and low Alarm thresholds according to safety specifications.
4. Data viewing: The stored alarm records can be viewed through the menu (1000 groups are supported).
5. Charging: When the power is insufficient, use the matching charger to charge the built-in lithium battery, and the Charging time is less than 5 hours.
Notice
* Please read the instructions carefully before use to ensure that it is used within the instrument range (0-20ppm) and applicable environment (temperature -20~ 50 ℃, Humidity 0~ 95% RH non-condensation).
* Do not charge or disassemble the instrument in hazardous areas such as explosive gas environments.
When the instrument alarms, appropriate safety measures should be taken immediately and evacuated to a safe area.
Avoid severe impact or prolonged immersion in liquids, despite its IP65 Protection Rating.
* Sensors have a lifespan of about 2 years and need to be calibrated or replaced regularly to ensure detection accuracy.
* Please use the original charger for charging.
The explosion-proof mark of the instrument is Exib IIB T3 Gb, please use it in scenarios that meet the explosion-proof requirements.
