Bill of materials
| title | price | shipping-price | items |
|---|---|---|---|
| Temperature sensor - DS18B20 | - | - | - |
| Microcontroller - ESP32 | 3.14 | - | - |
| Weight sensor HX711 (bar-type) | 4 | - | 4 |
| Aluminium profile 20x20x500mm | 24.61 | - | 2 |
| Battery (18650 type, Li-ion) shield | 5.53 | - | - |
| Battery (18650 type, Li-ion) | 9.42 | 8.33 | 4 |
| Aluminium Enclosure | 19.11 | 18.87 | - |
| Display - LCD1602 | 2.64 | - | - |
| Screws M4 x 25mm | 10.76 | - | - |
| Air Quality Sensor | - | - | - |
| Barometric pressure sensor | - | - | - |
| Barometric sensor - BMP180 | - | - | - |
| CO2 sensor - ENS160 | - | - | - |
| Carbon Dioxide CO2 Temperature Humidity VOCs Air Quality Sensor Module | - | - | - |
| Weight sensor HX711 (flat-type) | - | - | - |
| Microphone Amplifier Stable | - | - | - |
| PM2 dust sensor | - | - | - |
| Tampering - Vibration sensor | - | - | - |
| Temperature - Humidity sensor alternative | - | - | - |
Possible vendors
- 146 USD https://www.alibaba.com/product-detail/Weight-Pesage-Industrial-Balanzas-Load-Cell_1600454137483.html?spm=a2700.galleryofferlist.normal_offer.d_title.38c713a0EKDwRy&priceId=6e22a495b4744c7799663b3e1da26427
- 100 usd https://www.alibaba.com/product-detail/Stainless-Steel-Waterproof-Weighing-Industrial-Scale_1600910558433.html?spm=a2700.details.popular_products.11.6a5948747Tm3az
- http://en.pilot-scale.com/product_category/Bench-scale-series.html
- https://www.alibaba.com/product-detail/30kg-RS485-Modbus-Weighing-Scale-with_1600883502607.html?spm=a2700.galleryofferlist.normal_offer.d_title.5ce913a08zi3Ba&priceId=9626025c8bc247a29781849a5eed6cb2
- https://www.alibaba.com/product-detail/X-Type-Electronic-Digital-Scale-Stainless_1601348321471.html?spm=a2700.details.popular_products.3.600c6f35JXVI0w