AM-101 has been discontinued

PMV-PPD Index Meter AM-101

Thermal comfort is a subjective experience in which the human body feels satisfied with the hot environment. Discontent or discomfort can be caused by the whole body feeling uncomfortable with warmth or coolness, expressed as PMV and PPD indices.

Expected average thermal sensation index (PMV):
PMV is an index that indicates the average value of the expected population's votes for the following seven levels of heat sensation.
(+3 hot,+2 warm,+1 relatively warm, 0 moderate, -1 relatively cool, -2 cool, -3 cold)
The PMV index can be obtained by estimating the metabolic rate of human activity and the insulation value of clothing, while also requiring the following environmental parameters: air temperature, average radiation temperature, relative air velocity, and air humidity.
The PMV index is calculated based on human thermal balance. When the heat generated inside the human body is equal to the heat lost in the environment, a person is in a state of thermal equilibrium.

Expected percentage of dissatisfied individuals (PPD):
The PMV index is the average value of the population expected to vote for thermal sensation in a hot environment. Individual voting is dispersed around this average value, and its number facilitates the estimation of how many people feel uncomfortable (feeling the temperature is too high or too low).
The PPD index can provide a quantitative estimate of the number of people who are dissatisfied with heat.
PPD can predict the percentage of people in a group who feel too warm or too cold (based on a 7-level heat sensation vote indicating hot (+3), warm (+2), cool (-2), or cold (-3)).

PMV-PPD index meter AM-101 applicable standards:

GB/T 18049-2000 Determination of PMV and PPD Index in Medium Heat Environments and Requirements for Thermal Comfort Conditions.
GB/T 18049-2017 Human ergonomics of thermal environment analyzes, determines and interprets thermal comfort by calculating PMV and PPD indices and local thermal comfort criteria.
ISO 7730 :2005 Ergonomics of the thermal environment -- Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria. ( Human ergonomics of thermal environment - analysis, determination, and interpretation of thermal equipment using PMV and PPD indices and local thermal standards.

PMV-PPD index meter AM-101 technical parameters:

Measurement range: Temperature: 0-50 ° C, black sphere temperature: 0-50 ° C, average radiation temperature: 0-50 ° C, relative humidity: 0-100% RH, wind speed: 0-5m/s, PMV index:- 3~+3, PPD index: 0-100%.
Measurement accuracy: Temperature: ± 0.5 ° C (15-35 ° C), relative humidity: ± 3% (20-80% RH), wind speed: ± 0.1m/s (0-1m/s), ± 0.5m/s (1-5m/s).