How often do you need to refill the bottle at different humidity levels?

Please note I added a 30mm fan to move air across the wick. With humidity the 45% range and the fan operating, I need to add water about every 4 days.

Sper Scientific 736740 Masons Hygrometer

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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KD 15.89

Duties & taxes included

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Description

💧 Stay ahead of humidity—measure with precision, style, and zero fuss!

ECO FRIENDLY OPERATION - Zero batteries required—always ready, always reliable.
VIBRANT RED LIQUID DISPLAY - Easy-to-read, mercury-free red liquid enhances visibility and safety.
COMPACT TABLETOP FORM FACTOR - Sleek, lightweight design fits perfectly on any desk or workspace.
CLASSIC WET DRY BULB DESIGN - Time-tested method ensures accurate humidity measurement without digital guesswork.
PRECISION DUAL SCALE READINGS - Seamlessly switch between Celsius and Fahrenheit for versatile monitoring.

The Sper Scientific 736740 Mason's Hygrometer offers accurate humidity measurement using a classic wet and dry bulb system with dual temperature scales (-10/50°C and 10/120°F). Featuring a safe, easy-to-read red liquid display and requiring no batteries, this compact tabletop device is perfect for professionals seeking reliable environmental monitoring with a touch of vintage charm.

Specifications

ASIN	B00N5IRZS4
Battery Description	No batteries required
Battery description	No batteries required
Brand	Sper Scientific
Colour	White
Customer Reviews	3.7 out of 5 stars 36 Reviews
Item Weight	3.8 Ounces
Item weight	3.8 Ounces
Manufacturer	Sper Scientific
Manufacturer Part Number	736740
Model Number	736740
Mounting Type	Tabletop
Mounting type	Tabletop
Number of Items	1
UPC	077754662617 696738569263
Unit Count	1 Hygromete
Upper Temperature Rating	50 Degrees Celsius
Upper temperature rating	50 Degrees Celsius

Reviews

E**A

Five Stars

Easy to use and very handy to measure humidex in a work place.

5.07.2018

K**N

Kind of cheap, but it does work

One just has to be careful w/this device. The bottle is so small, the water there evaporates in a few days.

22.11.2021

A**R

Humidity

Good product .. Very accurate

14.02.2019

M**M

excellent service

excellent quality

25.08.2018

D**.

A good instrument/good price

A good instrument/good price, seems accurate and is easy to use. Some say it looks cheap due to the plastic but the plastic is tough

19.05.2016

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