Volatile Organic Compounds (VOCs) and odor gases are key regulatory priorities in atmospheric pollution control, serving as major precursors for ozone formation and photochemical smog. Odor pollution also severely affects living environments and public health. VOCs and odor online monitoring systems are essential for industrial park emission management, pollution source supervision, factory boundary odor detection and urban air quality early warning. Covering FID flame ionization detectors, PID photoionization detectors, gas chromatographs, mass spectrometers and odor electronic noses, these instruments enable trace-level identification of organic contaminants. High‑voltage power supplies represent critical core components, delivering high-sensitivity high voltage for FID polarization/collection electrodes, PID lamp drivers, ion trap electric fields and chromatograph electron multipliers. They support fundamental functions including sample ionization, ion collection and signal amplification. Their voltage stability, ultra-low ripple noise, ionization efficiency and wide-temperature adaptability directly determine detection limits, resolution, data accuracy and overall effectiveness of national VOCs pollution prevention. VOCs and odor monitoring impose eight extreme differentiated technical requirements: 1.Ultra-high sensitivity and ultra-low noise for trace detection. Detection thresholds reach ppb or ppt levels with picoampere-level detector signals. Ripple must be ≤0.001%, noise density ≤0.5 μV/√Hz and baseline noise ≤1 μV, fully complying with HJ 1011, HJ 1012 and GB/T 14675 to guarantee precise identification of ultra-trace VOCs and odor components. 2.Precise stability and linear output performance. Ionization efficiency and signal amplification are highly voltage-dependent. Strict specifications enforce stability ≤±0.01% per 8 hours, linear error ≤0.005% and load regulation ≤0.005%, maintaining accurate repeatable measurements despite fluctuating detector loads and ambient temperatures. 3.Extreme wide-temperature adaptability with intelligent thermal compensation. FID detectors operate above 200 ℃, while field installations endure −30 ℃ to +60 ℃ ambient fluctuation. Power supplies reliably function from −40 ℃ to +85 ℃ with temperature coefficient ≤±1 ppm/℃. Built-in full-range adaptive compensation eliminates voltage drift caused by high detector temperatures or outdoor climate variation. 4.Long-term unattended reliability for continuous annual operation. Permanently deployed in industrial zones and remote sites with limited maintenance access, power supplies achieve MTBF ≥1×10⁵ hours and design life ≥10 years, delivering drift-free performance without frequent recalibration. 5.Ultra-compact low-power integration for portable and miniaturized monitors. Single modules maintain volume ≤3 cm³ and weight ≤20 g, with peak efficiency ≥90% and static power ≤3 mW, ideal for handheld VOCs detectors and micro factory boundary stations. 6.Intrinsic safety explosion-proof design plus strong anti-interference capability. Deployed in chemical parks, oil depots and gas stations with flammable atmospheres, units comply fully with GB 3836 intrinsic safety standards. Superior electromagnetic immunity prevents interference with weak detection signals and eliminates false alarms. 7.Multi-channel high-isolation synchronous output for GC-MS systems. Independent high-voltage channels power electron multipliers, ion traps and deflection electrodes with isolation ≥5 kVAC, crosstalk ≤0.001% and precise synchronized timing, ensuring accurate ion separation and high-resolution analysis. 8.Intelligent control and regulatory compliance with traceable data. Supporting the HJ 212 environmental data protocol, power supplies enable remote tuning, real-time monitoring and tamper-proof data archiving. Seamless linkage with chromatograph temperature control and sampling systems realizes fully automated detection aligned with national VOCs supervision requirements. This methodology establishes a comprehensive technical framework covering high-sensitivity low-noise topology, wide-temperature adaptive optimization, explosion-proof safety engineering and long-term reliability design. It standardizes high-voltage power development for FID/PID detectors, gas chromatographs, VOCs analyzers and odor monitors, accelerating domestic breakthroughs in core environmental monitoring hardware. Addressing critical challenges in ultra-low noise, wide-temperature stability and hazardous-area safety, the universal architecture adopts high-frequency self-oscillating push-pull topology + low-drift linear regulation + fully sealed potting, enhanced with full-range thermal compensation and intrinsic safety protection. It overcomes traditional limitations including excessive noise, high temperature drift and unsuitability for flammable environments through eight core principles: 1.High-sensitivity low-noise topology optimized for ppt-level VOCs trace detection. 2.Full temperature multi-point calibration and adaptive compensation stabilizing output across extreme thermal conditions. 3.GB 3836-compliant intrinsic safety design ensuring reliable deployment in explosive chemical zones. 4.Extreme component derating and wearless construction achieving ≥10 years maintenance-free continuous operation. 5.High-isolation multi-channel synchronous output supporting high-precision GC-MS ion control. 6.Ultra-miniature lightweight low-power design for portable and micro monitoring terminals. 7.End-to-end electromagnetic shielding maintaining signal integrity in complex industrial electromagnetic environments. 8.HJ 212-enabled intelligent traceable control fully aligned with national VOCs emission regulatory standards.