A new type of Thermo-Hygro meter ＜Comfort Zone Indicator＞

The recent models of  Thermo-Hygro meters show not only the number of temperature and relative humidity (RH) but zoning like

Temp: Cold - Comfortable - Hot with colors

Cold: Blue
Comfortable: Green
Hot: Red or Orange

This color zoning is largely following the color temperate though green is located between yellow and blue in color temp.

Humidity: Dry - Comfortable - Wet

Zoning by color is difficult as there is no color humidity.  So there are some confusion.

Dry: Blue
Comfortable: Green
Wet: Red or Orange



















(no brand)

This is the same arrangement as the color temp zoning.

Wet: Blue
Comfortable: Green
Dry: Red or Orange

(no brand)

This arrangement seems better. Wet psychologically relates more with blue than red and orange while dry relates more with red and orange than blue. (<-30> placed in a strange direction but easy to read.)

＜Comfort Zone Indicator＞

When the comfort zone is your concern (in or out of comfort zone) you can find ＜Comfort Zone Indicator＞. ＜Comfort Zone Indicator＞ is not yet an established name of products in the market like thermometer you can guess easily what it is. As an indicator the following MINGLE (German brand, made in China) can be called ＜Comfort Zone Indicator＞. The arrow, instead of common hands (shown in the above products) indicates in which zone your are.

A Digital with Analog ＜Comfort Zone Indicator＞. Good design.

TFA barand. 

Also a German Brand. This photo is indicating almost the most comfortable state in digital (20.9 Deg C and RH60%) by my standard in Hing Kong but Analog shows somehow Wet. Correctly speaking this analog indicator ＜COMFORT＞ only shows ＜COMFORT＞zone in humidity. Very good design.

sptt

Inaccuracy of hygro meters

The measurement and display of thermometers brand by brand and model by model of the same brand are more more less the same, not precisely the same but can be considered as acceptable.

On the other hand he measurement and display of hygro meters quite differ brand by brand and even model by model of the same brand. One shows RH 65% while another one shows RH75%. If you go to a show room of the thermo-hygro meter company or a booth at an exhibition you can easily see this difference. If you are critical and point out this problem to a sales man/woman he or she will be put in a difficult situation and may be angry at you.


sptt

Analog or Digital

Thermo-Hygro Meters used to be analog only until digital displays became popular and common as seen in watches and clocks, say maybe in 1970s.


It is a matter of taste now whether Digital or Analog is better. Now in late 2010s Analog types are not necessarily old fashion or legacy while Digital types are new as Digital types are so commonly seen so that people feel Digital types being new and in fashion.

Inside of Thermo-Hygro Meters

Analog

The inside is surprisingly simple. Because of this simplicity and well made of this model (German brand MINGKE) I have used this more than 15 yeas without any problem. No battery is required.

 Digital

 Digutal type is a electronic product. One thermo (temperature) sensor and one hygro (humidity) sensor, one IC (which is not seen as it is under the black large do)t, one LED for display.


Advantages and disadvantages

Analog

Advantages
- easy to see (no need to read, like a speedometer or oil gauge in a car front panel)
- no battery required, maintenance free.
- easy to show zones.
- many different colors can be used at relatively lower cost.

Disadvantages
- not easy to see the exact value (number).


Digital

Advantages
- usually shows down to lower than decimal pint in temp.
- can add a digital clock easily.
- can add some more information in digital form easily though wi-fi or some other wireless means.

Disadvantages
- a battery or some other power source (usually electrical) is required.
- difficult to show zones digitally.
- use of color LCD is relatively expensive.


sptt