Psychrometer °F

Name: Psychrometer °F
Rating: 4.6 (103 reviews)
Author: JUN KANAYAMA

Calculate comfort.

Only for iPhone

Free

103 Ratings
Ages

4+
Years
Category

Productivity
Developer

JUN KANAYAMA
Language

EN
+ 1 More
Size

9.2
MB

iPhone

This app calculates thermal comfort. It evaluates heat, cold, dryness, and moisture, and indicates whether conditions are within a comfortable range. You can easily adjust values with a dial, and temperature is color-coded for clarity. By entering either temperature and humidity, dew-point temperature, or wet-bulb temperature, the following air properties can be calculated accurately: Dry-Bulb Temperature (°F) Wet-Bulb Temperature (°F) Dew-Point Temperature / Frost Point (°F) Relative Humidity (%RH) Mixing (Humidity) Ratio (gr/lb) Absolute Humidity (gr/ft³) Enthalpy (Btu/lb) Specific Volume (ft³/lb) Atmospheric Pressure (inHg) Vapor Pressure (inHg) Saturation Vapor Pressure (inHg) Temperature–Humidity Index (Discomfort Index) (“Good” indication in the temperature range of 68 to 82 °F and humidity of 30 to 60%.) Easy dial input. You can automatically enter the outdoor temperature and humidity from weather information (please allow use of location information). If you use a psychrometer, please choose from three types. (When not using one, keep Assmann as the default.) Assmann: aspirator psychrometer; forced-ventilation type. Natural: August psychrometer; simple, wall-mounted, without forced ventilation. Sling: sling psychrometer; swung by hand. (If you press the Reset button or the Outdoor button, it returns to the ventilation type. Except for the ventilation type, only wet-bulb input is available.) The following can be read without a psychrometric chart: By fixing the input mode to dew-point input (°F DP) and increasing/decreasing the upper dial, you can read heating/cooling changes. By fixing the input mode to wet-bulb input (°F WB) and increasing/decreasing the upper dial, you can read humidification/dehumidification changes. For steam humidification, fix the input mode to humidity input (%) and increase/decrease the lower dial to read. The Sonntag formula is used for saturation vapor pressure; Sprung and Ferrel are used for vapor-pressure calculations. Relative humidity is calculated according to WMO. This app does not measure values at your current location; it retrieves weather information. The input range is wide for usability, but entering extreme values increases error and may cause calculation errors. Also note that rounding and other internal calculations may change the least significant digits, so numbers may vary slightly when switching modes. We make every effort to ensure the accuracy of the results, but we do not guarantee it. We are not responsible for any damages, losses, or disadvantages that occur during use.

Ratings & Reviews

4.6

out of 5

103 Ratings

Just what I wanted
07/31/2022

Jim Jacoby
I have been using this app for about two month. The only fault I could find is the ads. Personally, I would like an option to pay for an ad-free version. But the developer had done a good job of minimizing the impact of the ad. I have checked the results against a thermodynamic program that I use for process simulation. The programs match up. I have found this app to be easy to use and intuitive. If one is an HVAC professional, this app and a good hygrometer are just what one needs to “get it right.” Way cool.UPDATE: I discovered that the developer has a different version called CalcComfort that includes a pro version that deletes ads and includes additional features like Frost point for temps below freezing. Excellent.

Developer Response
Thank you very much for using this application.We are very pleased that you understand the purpose of the application.
Just what I wanted
07/31/2022

Jim Jacoby

I have been using this app for about two month. The only fault I could find is the ads. Personally, I would like an option to pay for an ad-free version. But the developer had done a good job of minimizing the impact of the ad. I have checked the results against a thermodynamic program that I use for process simulation. The programs match up. I have found this app to be easy to use and intuitive. If one is an HVAC professional, this app and a good hygrometer are just what one needs to “get it right.” Way cool.UPDATE: I discovered that the developer has a different version called CalcComfort that includes a pro version that deletes ads and includes additional features like Frost point for temps below freezing. Excellent.
Developer Response 08/03/2022
Thank you very much for using this application.We are very pleased that you understand the purpose of the application.
Very Useful for Home Weather Station
10/27/2015

RBW in NJ
Used the app to calibrate humidity readings of a home weather station.
Very Useful for Home Weather Station
10/27/2015

RBW in NJ

Used the app to calibrate humidity readings of a home weather station.
Review
05/23/2020

Blasteroid77
Excellent. Especially for free and the ad doesn’t dominate the app like most free apps. It also is t from and center in fact it sits lightly at the top and sort of blends in unnoticeably.
Review
05/23/2020

Blasteroid77

Excellent. Especially for free and the ad doesn’t dominate the app like most free apps. It also is t from and center in fact it sits lightly at the top and sort of blends in unnoticeably.
Terrible
01/30/2021

milkbone789
Confirmed the values by plotting on a psychrometric chart and it wasn’t even close!

Developer Response
Thanks.Please tell me specifically how it does not fit the psychrometric chart.
Terrible
01/30/2021

milkbone789

Confirmed the values by plotting on a psychrometric chart and it wasn’t even close!
Developer Response 02/01/2021
Thanks.Please tell me specifically how it does not fit the psychrometric chart.

Improved text readability. Added a link to PsychrometerPro.

Version 3.5

Dec 14

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:
- Location
Data Not Linked to You

The following data may be collected but it is not linked to your identity:
- Location
- Diagnostics