Honeywell HPM Series Particulate Matter Sensors

Honeywell HPM Series Particulate Matter Sensors

HPM series particulate matter sensor: high-precision laser scattering technology empowers air quality monitoring

With the increasing attention to air quality, real-time monitoring of particulate matter concentration has become an important functional requirement in the fields of environmental monitoring, HVAC systems, air purification equipment, and smart homes. The Honeywell HPM series particulate matter sensors are an ideal choice for various air quality monitoring applications due to their laser scattering detection principle, high-precision output, long-life design, and industrial grade electromagnetic compatibility performance.

Product Overview and Technical Principles

The HPM series particle sensor is a particle detection device based on the principle of laser scattering. Its working method is as follows: the air sample is sucked into the detection chamber through an internal fan, and the laser light source irradiates the particles in the airflow. The light reflected by the particles is received by the photodetector, and the system analyzes and converts the light signal into an electrical signal, finally calculating the concentration of particles per unit volume.

The detection concentration range of this sensor is from 0 μ g/m ³ to 1000 μ g/m ³, covering a wide range of application needs from clean environments to high pollution scenarios.

Product model and output configuration

The HPM series offers two external dimensions, standard and compact, to meet different installation space and system integration requirements:

Model Description

HPMA115SO-XXX standard size, UART output, PM2.5 and PM10 output

HPMA115CO-003 compact size, UART output, inlet and outlet on the same side

HPMA115CO-004 compact size, UART output, inlet and outlet on opposite sides

The standard version provides PM2.5 and PM10 concentration outputs, while the compact version adds PM1.0 and PM4.0 outputs to provide users with richer particulate matter classification data.

Core technical specifications

1. Detection accuracy

The HPM series has high-precision measurement capabilities in different concentration ranges:

Range of 0-100 μ g/m ³: PM2.5 accuracy is ± 15 μ g/m ³

Range of 100-1000 μ g/m ³: PM2.5 accuracy of ± 15%

Compact versions PM1.0, PM4.0, PM10: accuracy within the range of 0-100 μ g/m ³ is ± 25 μ g/m ³, and accuracy within the range of 100-1000 μ g/m ³ is ± 25%

2. Response time

The sensor response time is less than 6 seconds and can reflect real-time changes in environmental particulate matter concentration, making it suitable for dynamically adjusted air purification and ventilation systems.

3. Electrical characteristics

Supply voltage: 5 V ± 0.2 V

Maximum operating current: 80 mA

Standby current:<20 mA (at 25 ° C)

Maximum surge current: 600 mA

Output protocol: UART, baud rate 9600, 8 data bits, 1 stop bit, no checksum

To ensure power stability, it is recommended to configure 22 μ F electrolytic capacitors and 100 nF and 10 nF ceramic capacitors at the power output end to reduce ripple and noise effects.

4. Environmental adaptability

Working temperature: Standard version -20 ° C to 50 ° C, Compact version -20 ° C to 70 ° C

Storage temperature: Standard version -30 ° C to 65 ° C, Compact version -40 ° C to 85 ° C

Working and storage humidity: 0% RH to 95% RH, non condensing

Laser safety level: Class 1, compliant with IEC/EN 60825-1 standard, wavelength 650 nm

5. Electromagnetic compatibility performance

The HPM series has undergone rigorous electromagnetic compatibility testing and meets the requirements of the industrial standard IEC61000 series

ESD: ± 4 kV contact discharge, ± 8 kV air discharge

Radiation immunity: 1 V/m (80 MHz to 1000 MHz)

Fast transient pulse: ± 0.5 kV

Conducted immunity: 3 V

Radiation emission: Complies with CISPR 14 standard

This performance enables it to operate stably in industrial environments, avoiding measurement errors caused by electromagnetic interference.

Key differentiation advantages

1. 10-year continuous service life

The HPM series sensors use high-quality optical components and optimized circuit design, which can achieve a service life of up to 10 years in continuous operation mode. This feature significantly reduces the frequency of equipment maintenance and replacement costs, especially suitable for application scenarios that require long-term online monitoring.

2. Industrial grade EMC performance

Based on the IEC61000 standard, the electromagnetic compatibility design ensures that the sensor can maintain a PM2.5 measurement accuracy of ± 15% even in strong electromagnetic interference environments such as motors, frequency converters, and wireless communication devices, providing reliable guarantees for industrial and commercial applications.

3. Quick response

A response time of less than 6 seconds enables the sensor to track changes in air quality in real time, providing real-time feedback for air purification equipment and improving system control efficiency.

4. Flexible installation methods

The HPM series offers two sizes: standard and compact. The compact version also provides two configurations for inlet and outlet on the same side and opposite side, adapting to different equipment structures. The installation direction has been optimized to effectively prevent the accumulation of particulate matter at the inlet and outlet, ensuring long-term measurement accuracy.

Communication Protocol and Data Format

1. Standard version communication protocol

The standard version sensor supports the following UART commands:

Read particulate matter measurement results: obtain PM2.5 and PM10 concentrations

Start/Stop Particle Measurement: Control Sensor Working Status

Set/Read Customer Adjustment Factor: Supports user calibration

Enable/Stop Automatic Sending: Control the Active Data Reporting Mode

The data frame length is 32 bytes, including the frame header, data fields, and checksum to ensure communication reliability.

2. Compact Communication Protocol

The compact version extends PM1.0 and PM4.0 outputs on the basis of the standard version. In the measurement result response frame, the data fields are as follows:

Data0: PM1.0 concentration (high byte)

Data1: PM1.0 concentration (low byte)

Data2: PM2.5 concentration (high byte)

Data3: PM2.5 concentration (low byte)

Data4: PM4.0 concentration (high byte)

Data5: PM4.0 concentration (low byte)

Data6: PM10 concentration (high byte)

Data7: PM10 concentration (low byte)

The remaining data bytes are reserved for future expansion.

3. Automatic sending mode

The sensor supports automatic transmission mode, which can actively report measurement data according to the set frequency after activation, without the need for host polling, simplifying system software design.

Precautions for Mechanical Installation and Design

1. Installation direction

To ensure measurement accuracy and long-term stability, sensors must be installed in the specified direction. Both the standard and compact versions provide detailed installation direction diagrams, requiring:

The inlet and outlet are not obstructed

Smooth airflow path without additional resistance

Prevent particulate matter from settling or accumulating at the inlet and outlet

2. Installation dimensions

Standard version: 43 mm × 36.00 mm × 23.7 mm

Compact version: 44 mm × 36 mm × 12 mm

The compact version has a thickness of only 12 mm and is suitable for equipment designs with limited space.

3. Fixed method

The sensor is fixed to the installation surface with screws of specified size, and the installation hole position and size are detailed in the data manual to ensure installation reliability and consistency.

Typical application scenarios

The HPM series particulate matter sensors are widely used in the following fields:

1. HVAC system

In commercial and residential HVAC systems, sensors monitor indoor PM2.5 and PM10 concentrations in real-time, providing control basis for fresh air systems and air purification units, achieving on-demand ventilation and energy-saving operation.

2. Indoor air quality monitoring device

As the core sensing element of portable or fixed air quality monitoring devices, the HPM series provides accurate particulate matter concentration data, combined with temperature, humidity, CO ₂ and other sensors, to build a comprehensive indoor environmental monitoring solution.

3. Air purifier

Whether it is a household air purifier or a commercial air treatment equipment, the HPM series can provide real-time feedback on changes in particulate matter concentration and support wind speed adjustment and filter life prediction in automatic mode.

4. Vehicle mounted air purification system

The compact sensor has a small size and is suitable for integration into car air conditioning systems or in car air purifiers, providing a clean indoor air environment for drivers and passengers.

5. Industrial environment monitoring

With industrial grade EMC performance and wide temperature capability, the HPM series can also be applied to industrial environments such as factory workshops and clean rooms to assist in environmental control and occupational health monitoring.

Certification and Compliance

The HPM series sensors comply with the following standards and regulatory requirements:

RoHS: Compliance with the Restriction of Hazardous Substances Directive

REACH: Compliance with Chemical Registration, Evaluation, Authorization, and Restriction Regulations

Laser Safety: IEC/EN 60825-1 Class 1 Laser Product Safety Standard

Electromagnetic compatibility: CISPR 14, IEC61000 series

Installation and usage precautions

1. Prevent the accumulation of particulate matter

During installation, ensure that the inlet and outlet directions of the sensor are correct to avoid airflow obstruction. Sensors should be kept away from particulate matter emission sources to prevent dust from accumulating in the intake duct and affecting measurement accuracy.

2. Power supply design

To ensure stable operation of the sensor, the power supply design should meet the requirements of ripple and noise, and be equipped with recommended decoupling capacitor combinations. The power supply voltage should be strictly controlled within the range of 5 V ± 0.2 V.

3. Electrostatic protection

The sensor contains sensitive optical and electronic components inside, and electrostatic protection measures should be taken during installation and operation to avoid damage to the components caused by electrostatic discharge.

4. Not applicable to safety critical applications

The HPM series sensors are designed specifically for air quality monitoring and should not be used as safety or emergency shutdown devices, nor for critical control applications that may cause personal injury.