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 | Desertcart British Virgin Islands

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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$78.73

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

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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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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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$78.73

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.