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Waveshare ESP32-S3 Development Board ESP32-S3R2 GEEK 1.14-inch LCD ST7789 for USB Dongle Support 2.4GHz WiFi BLE5
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M5Stack M5GO IoT Starter Kit V2.7 High Performance IoT Start Development Kit ESP32 2-inch IPS Screen for Arduino
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M5Stack Glass2 Unit 1.51-inch Transparent OLED Extended Screen Unit for SSD1309 Driver Solution
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MQ 137A Ammonia Gas Sensor Toxic Gas Sensor Conponents for Security
Description:
- Application:For Family,Factory, Public use for toxic gas leaking monitoring as a alarm device
Specfications:
- Application for: Ammonia
- Detect range:10-300ppm
- Standard sense gas: 50ppm Ammonia
- sensitivity:R in air/R in typical gas≥3
- Sensor Resistance:1KΩ to 50KΩ in 50ppm Ammonia
- Response time:≤30s（70% Response）
- Recovery Time:≤60s（70% Response）
- Heating resistance:31Ω±3Ω
- Heating current:≤180mA
- Heating Voltage:5V±0.2V
- heating Power:≤900mW
- Voltage:≤24V
Working condition:
- Tmperature:-10℃ to 50℃
- Humidity:≤95%RH
- Storage condition
- Temperature: -20℃-70℃
- Humidity:≤70%RH
