Particulate Matter Data Logger   

  • Fast and easy detection of indoor PM1.0, PM2.5, PM4.0 , PM10
  • User settable alarms
  • Use as stand alone or in networks  
  • Directly accessible via integrated web server
  • Highly accurate and relable
  • Free application software
  • FDA 21 CFR part 11 compliant  
  • Commonly used in building automation, Garages and workspaces, Offices in the process industry, and cleanrooms.  

Although it’ s difficult to estimate the percentage of time every individual spends indoors, it is a matter of fact that the incidence of PM on health is often overlooked. When we talk about indoor PM we do not only mean the particulate matter generated by indoor activities such as combustion, fumes or other substances of biological origin. Indoor particulate matter is also the result of the inward migration of external particulate matter, a migration that can occur in a variety of ways: from cracks in the building envelope to infiltration, from the type of filters and ventilation used to natural ventilation and consequently to the external environment around us. It is therefore essential that indoor PM exposure is regularly measured and controlled in order to avoid harmful health effects.

User Manual 

Technical Specifications HD50PM

Measuring Principle Laser scattering
Measuring Range 0 to 1000 μg/m3 (for each pollutant)
Particle size detection range 0.3 to 10 μm diameter
Measuring Range 0 to 2,000 W/m2
Resolution 0.1 μg/m3
Accuracy @ 10-40C ± 10 μg/m3 (0...100 μg/m3) / ± 10% measure (100...1000 μg/m3)
Warm up time  < 8 seconds

General Characteristics

Measuring Interval

(Same as logging interval) 

1, 2, 5, 10, 15, 30 seconds / 1, 2 5, 10, 15, 30, 60 min
 Internal Memory

Circular management or stop logging if full. 

The number of samples that can be stored is from 469,510 to 906,640 depending on the number of quantities selected for logging. 

Interfaces  Wi-Fi (IEEE 802.11b/g/n) and ETHERNET (RJ45 connector)

Acoustic by means of the internal buzzer, LED on the front panel, sending of e-mails. 

Configurable for each detected quantity

Power Supply External 7 to 30 Vdc
Operating Conditions -10…+60 °C / < 100%RH non-condensing

Material: Polycarbonate 

Dimensions: 130 x 90 x 40 mm (156 x 90 x 44 mm with flanges) 

Protection degree: IP 54 (with protective cap on RJ45 connector)

Weight  300g approx
Installation Wall mount indoors 

Ordering information

Model Description Order Online

Data logger with integrated Web Server.

It includes HD35AP-S and HDServer1 softwares downloadable from Delta OHM web site. 

Supplied with: pair of flanges for wall mounting, adapter from M8 connector to screw terminals for connecting the power supply.


HD50PM with graphical display

HD35AP-CFR21  Advanced version of the PC application software in accordance with the FDA 21 CFR part 11 recommendations. For Windows®operating systems.

Power supply cable. M8 connector on one side, free wires on the other.

 Available lenghts: 2, 5 or 10 m.


Splitter PoE, output 12 V, connector M8


Stabilized mains power supply 100-240 Vac /12 Vdc-1A. M8 connector.