The digital illuminance measurement process: 0 1 ~ 200000Lux; Resolution: 0.1Lux Display: 31/2 digit LCD Sampling rate: 2.5 seconds / Noise Analyzer measurement range: 35dB ~ 130dB Resolution: 0.1dB, the second reading is updated every second second frequency range: 20Hz ~ 10000Hz digital hygrometer Range and Resolution: -20 ℃ ~ + 60 ℃ / 0.1 ℃, 10 ~ 95% RH / 0.1% RH Accuracy: ± 0.8 ℃, ± 4% RH using imported high-end hygrometer probe carbon monoxide analyzer measuring range: 0-199.9ppm; pump-priming, pumping automatic real-time detection accuracy: ± 2% FS Resolution: 0.1ppm Power Supply: Built-in high-performance rechargeable lithium carbon dioxide analyzer principle: NDIR infrared principle measuring range: 0 ~ 5000ppm (0 ~ 0.5%) Resolution: 1ppm; precision: ≤ 3% FS pump-priming, pumping automatic real-time detection Response time: <30s digital wind instrument measuring range: 0.05 ~ 10m / s Accuracy: ± (reading × 2% + 0.1) m / s (0.05 ~ 5m / s); ± (reading × 2% + 0.2) m / s (5 ~ 10m / s)