Nexisense ZPHS01 All-in-One Air Quality Detection Module: The Core Solution for Smart Device Environmental Perception

Engineering Positioning of Indoor Air Quality Monitoring in Intelligent Systems

In the process of modern building and equipment intelligence, Indoor Air Quality (IAQ) has become a core control variable. Air purifiers, fresh air heat recovery systems, variable frequency air conditioners, and Building Management Systems (BMS) need real-time acquisition of multi-dimensional environmental data to achieve closed-loop regulation, energy efficiency optimization, and health protection. The Nexisense ZPHS01 all-in-one air quality detection module, through high integration of five key parameters (formaldehyde, TVOC, PM2.5/PM10, CO₂, and temperature/humidity), provides OEM manufacturers and system integrators with a standardized and reliable environmental perception front-end, reducing the complexity and calibration burden of multi-sensor layouts.

The module responds to the requirements of ASHRAE 62.1 ventilation standards, GB/T 18883 indoor air quality standards, and WELL building standards, supporting quantitative monitoring from microgram-level pollutants to ppm-level CO₂. Integrators can use it as an edge node to build an architecture of "data collection-edge processing-cloud analysis," achieving predictive maintenance and dynamic response, thereby enhancing the market competitiveness of terminal products.

Core Module Functions and Sensing Technology Architecture

The ZPHS01 module adopts a multi-sensor fusion design, with each channel independently optimized to ensure minimized cross-interference and long-term stability.

• Formaldehyde (HCHO) channel: Electrochemical sensor, range 0-1 ppm, resolution 0.001 ppm, response time <60 s, providing high sensitivity for low-concentration continuous release sources.

• TVOC channel: MEMS-type or PID-assisted sensor, range 0-10 ppm (isobutylene equivalent), reflecting total volatile organic compound load, supporting post-decoration and daily pollution assessment.

• Particulate matter channel: Laser scattering principle, simultaneous output of PM1.0, PM2.5, and PM10, particle size resolution 0.3 μm, sampling frequency 1 Hz, suitable for dynamic dust monitoring.

• CO₂ channel: NDIR dual-wavelength technology, range 0-5000 ppm (expandable to 10000 ppm), accuracy ±(50 ppm + 3% of reading), Automatic Baseline Correction (ABC) algorithm guarantees long-term zero-point stability.

• Temperature and humidity channel: Digital composite sensor, temperature ±0.3°C (-20~60°C), humidity ±2% RH (0-100%), used for thermal comfort index calculation and dew point compensation.

Overall module power consumption <0.5 W (typical), supporting 5 V or 3.3 V power supply, MTBF >50,000 hours, suitable for continuous operation scenarios. Data output uses UART (default 9600 bps) or I2C interface, with a simple and open protocol for easy embedded development.

Application Scenarios and Project Integration Cases

The ZPHS01 module provides flexible embedded solutions for B2B project needs; typical deployments are highlighted below.

Smart Control for Air Purifiers and Fresh Air Systems

Purifiers need to automatically adjust fan speed and filter modes based on real-time IAQ indices. Fresh air systems rely on CO₂ and pollutant concentrations to link heat exchange and air makeup volume.

Project Case: A fresh air equipment manufacturer integrated the ZPHS01 module into the main control board for a high-end residential project. Data is collected via the UART interface, and the MCU runs a fuzzy PID algorithm to achieve closed-loop control of CO₂ <800 ppm and PM2.5 <35 μg/m³. Result: Energy consumption reduced by 18%, user satisfaction improved, and module stability supports calibration-free operation for over 3 years. The solution is compatible with ESP32 and STM32 series, facilitating OTA firmware upgrades.

Multi-zone Monitoring for HVAC and Building Automation Systems

Central air conditioning and VAV systems require zone air quality data to optimize air supply strategies. ZPHS01 serves as a distributed node, supporting RS-485 expansion networking.

Case: In a commercial office building BA system upgrade, the integrator deployed ZPHS01 at each floor's return air vent, accessing the PLC via Modbus RTU protocol to achieve building-wide CO₂ and PM2.5 gradient mapping. Linked with fresh air valves and humidifiers, it maintains the ASHRAE 55 comfort zone. Project data shows a 15% increase in ventilation energy efficiency ratio and generated compliance reports to support LEED certification.

Smart Home and IoT Environmental Gateways

Smart home platforms require unified environmental data sources. The ZPHS01 module is integrated into gateways or edge devices, supporting Wi-Fi/LoRa/ZigBee bridging.

In a large-scale apartment IoT project, the supplier embedded ZPHS01 into a multi-sensor Hub, and collected data was uploaded to a cloud platform via MQTT. Algorithms fused temperature, humidity, and pollutants to achieve linked curtains, air purification, and alarm pushes. Deployment exceeded 5000 points, with module consistency ensuring system reliability.

Air Quality Monitoring Terminals for Laboratories and Schools

Precision laboratories and classrooms need continuous IAQ recording to comply with occupational health and education standards. ZPHS01 supports data logging functions for easy local storage and export.

Selection Guide: Matching Equipment Conditions and Integration Requirements

Selection focuses on parameter coverage, interface compatibility, and environmental adaptation.

Integration Precautions: Ensuring System Stability and Compatibility

Installation and Airflow Design:
Place the module in the air intake straight section or sampling chamber, avoiding dead zones and turbulence. Laser particulate channels need dust screen protection and regular cleaning (suggested every 6 months). Temperature and humidity sensors should be kept away from heat sources.

Calibration and Maintenance Strategy:
Factory calibration is NIST traceable; field zero/span adjustments are supported. CO₂ ABC algorithm runs automatically; electrochemical channels are suggested for annual verification. Integrated self-diagnosis registers monitor sensor health.

System Integration and Data Processing:
The SDK provides driver libraries (C/Arduino), supporting parallel collection from multiple modules. Consider response time differences during data fusion, using Kalman filtering for smoothing. Power isolation and grounding optimization reduce noise.

Mitigation of Potential Challenges:
Cross-interference: algorithm compensates for the impact of TVOC on formaldehyde. Long-term drift: regular background correction. EMC: shielded cables and filter capacitors.

The Nexisense Advantage: OEM Customization and Bulk Supply

Nexisense focuses on sensor module OEM cooperation, providing housing customization, interface protocol adjustment, firmware optimization, and brand labeling services. Annual capacity exceeds 200,000 units, with a delivery time of 4-6 weeks; ISO 9001 certification ensures batch consistency. Supporting everything from small-batch validation to large-scale production, reducing development risks and supply chain costs. Long-life design and supply chain stability help customers iterate products quickly.

FAQ

Q1: Which key parameters does the ZPHS01 module support for monitoring?
A1: It integrates five parameters: formaldehyde (HCHO), TVOC, PM2.5/PM10, CO₂, and temperature/humidity, providing comprehensive IAQ data.

Q2: What is the default communication interface of the module? How to connect to an MCU?
A2: The default is UART (9600 bps), compatible with I2C; protocol documentation and sample code are provided for easy STM32/ESP32 integration.

Q3: How is CO₂ data utilized for control in fresh air systems?
A3: By setting thresholds (e.g., 800 ppm) to trigger fresh air valve opening adjustment, achieving Demand Controlled Ventilation (DCV).

Q4: What principle is used for particulate matter detection? How is the accuracy?
A4: Laser scattering method; PM2.5 accuracy is ±10 μg/m³ or ±10% (whichever is greater), supporting continuous sampling.

Q5: What options are included in OEM customization?
A5: Housing design, range adjustment, interface protocol modification, firmware function development, and LOGO silk-screening, etc.

Q6: How are bulk supply delivery times and quality assurance handled?
A6: Standard delivery time is 4-6 weeks. Each batch undergoes full functional testing and environmental aging verification, with ISO 9001 certification.

Q7: What is the module's reliability in high-humidity environments?
A7: Operating humidity is 0-95% RH non-condensing; NDIR and electrochemical channels have built-in compensation algorithms to maintain long-term stability.

Q8: How to achieve multi-module networking and data upload?
A8: Supports RS-485 Modbus expansion or via gateways to MQTT/LoRaWAN for cloud aggregation and remote management.

Conclusion: Empowering Integrators to Build Next-Generation Smart Environmental Equipment
The Nexisense ZPHS01 all-in-one air quality detection module, with its high integration, reliable sensing technology, and open interfaces, empowers air purification, fresh air, HVAC, and smart building projects to achieve full-link optimization from data collection to smart decision-making. Facing increasingly strict IAQ standards and user health needs, system integrators, IoT providers, and equipment manufacturers can utilize our modules and technical support to accelerate product implementation and enhance competitiveness. Welcome to contact the Nexisense team to discuss specific integration plans and customized needs, and jointly advance the development of smart environmental perception applications.