tender for purchase of accessories , purchase of chemicals , arduino nano esp32 • dual-core 32-bit lx7 microprocessor • operating voltage - 3.3v • wi-fi & bluetooth connectivity , co2 sensor - scd 30 • size (35×23×7 mm) • measuring range 400 ppm - 10.000 ppm • operating temperature range 0 to 50 0c • digital interface uart or i2c , nox sensor - dfrobot fermion mems • size (13x13x2.5mm) • detection of no2, operating current ＜20ma • sensitivity: r0(in air)/rs(in 5ppm no2) ≥ 0.5 , pm 2.5 sensor - pms5003 • size (50×38×21 mm) • pm1.0, pm2.5, pm10 concentration output (μg/m³) • effective range: 0-500 μg/m³ • storage temperature range -40 to 80 0c , hc sensor - adafruit mics-5524 • size (5 x 7 x 1.55 mm) • target gases - ethanol c2h6oh 10 - 500 ppm, hydrogen h2 1 - 1000 ppm, ammonia nh3 1 - 500 ppm, methane ch4 1000 ppm • operating temperature -30 to 85 0c , ulpsm module for spec construction of • 0 to 3 v analog signal output, low power consumption 45 μw • fast response ( 30 seconds), on-board temperature sensor • easy sensor replacement, standard 8-pin connector , gravity construction of sensor • detection range: 0-1000ppm, working voltage: 3.3～5.5v dc • working current: ＜5ma, working temperature: -20～50℃ • output signal: i2c, uart (0~3v), analog voltage , mics 6814 multigas sensor • size (35 x 50 mm) , gsm/gprs with power: 3.8 v • lte cat1 wireless communication module with 4g data • interfaces: 1x power button, 1x bat, 1x uart, 1x usb-c, 1x sim card slot , particulate matter sensor breakout (for pms5003) • dimensions - 17.7 mm x 17.75 mm • operating supply voltage - 5 v • product type - multiple function sensor development tools • tool is for evaluation of - pms5003, type - particulate matter sensor , raspberry pi model 5 • broadcom bcm2712 2.4ghz quad-core 64-bit arm cortex-a76 cpu with cryptographic extension • 512kb per-core l2 caches & 2mb shared l3 cache • bluetooth 5.0 & microsd card slot , gsm module sima7670c • adiy sim a7670xx 4g lte cat-1 module • lm39302 development board v1 • interfaces: power button, uart, usb-c, sim card slot, i2c interface, antenna interface