While here, Honeywell offered answers to some of their most frequently asked questions.
Q. What is the part number for a mating connector?
- A. They use a Molex 51021-0800
Q. What size particles does the HPM Series detect?
- A. The HPM Series can detect particulates from 0.3 µm to 5 µm in size. The sensor uses the particle count data to provide a PM2.5 reading and a calculated PM10 reading.
Q. What particle distributions are the HPM Series calibrated against?
- A. The HPM Series is calibrated to cigarette smoke, which most closely correlates to burnt fossil fuels or smog. The sensor can be calibrated to other particle distributions upon request.
It is important to understand which calibration is used if you are comparing sensors. If you were to put a sensor that is calibrated to cigarette smoke next to a sensor calibrated to Dust or Pollen they will have different readings.
Q. How accurate is the HPM Series?
- A. Engineered for excellent accuracy, the HPM Series is able to detect particulate densities to within ±15% accuracy.
While this seems like a a poor accuracy we were informed that some competitive devices offer accuracy of ±30% or worse.
Q. Does the HPM Series use a laser or an LED to analyze media?
- A. The HPM Series uses a laser-based sensing design which maximizes accuracy.
Q. What is the expected service life of the HPM Series?
- A. With an expected service life of 20,000 hours, the HPM will operate for seven years when used for eight hours a day.
This is a running clock so just when operating the unit.
Q. How fast does the HPM Series analyze media and respond?
- A. Ultra-fast, the HPM Series analyzes media in less than six seconds. This speed allows the HPM Series to quickly analyze and provide data to supporting equipment, allowing the device to respond to changing conditions in real-time.
It was suggested while we were in training to allow the unit to run for 15 seconds to ensure that you see a normalized result. The output of the sensor is a 10 second average.
Q Does orientation matter?
- A Yes, they do have an installation orientation listed in the Data sheet. This is to ensure there is no buildup of particulate matter inside the housing. Here is a snip from the data sheet.