how accurate (%) is the humidity reading?

Humidity is accurate, i would say +-5% but after just maybe 2 weeks of hanging on wall dials on temp. become loose and ist very fiddly to reset To be honest do not buy...

How big is it? It looks beautiful, but I don't see the diameter written anywhere!

Diameter is just under 100mm (4inches) and depth/thickness is about 40mm (1.5inches) including the knurled adjustment knobs on the front.

CAN THE UNIT BE MOUNTED FOR OUTDOOR USE?

Hi Stewart, I'm not overly impressed with this product as I find the min and max needles stiff and awkward to reset. As to your question.... I have mine mounted under my car port as not confident of it being water proof. Doesn't appear to be that accurate either but that may be due to it's frost protected position underneath the car port. Product instructions didn't seem to suggest that it's rain proof and has open slots in outer casing.

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Brannan Max Min Thermometer and Hygrometer

Product ID: 52625673

Details

Battery description
No batteries
Brand
Brannan
Colour
Bronze Effect
Item weight
0.22 Pounds
Product dimensions
10.9W x 4.8H

💧0-100% humidity range

🌡️Max/Min temp tracking

🛠️Wall-mount, no batteries

4691 kr

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Description

🌿 Stay ahead of the climate curve—because your plants deserve the best!

GREENHOUSE READY - Specifically engineered for indoor and greenhouse environments to support your gardening expertise.
ALL IN ONE MONITORING - Track both max/min temperatures and current humidity levels effortlessly in one stylish dial.
EFFORTLESS INSTALLATION - Wall-mounted design requires no batteries—set it and forget it for continuous monitoring.
PRECISION CLIMATE CONTROL - Accurately monitor temperature fluctuations within ±1°C for optimal plant care.
TRUSTED QUALITY SUPPORT - Backed by Brannan’s reliable accuracy and dedicated customer service for peace of mind.

The Brannan Max Min Thermometer and Hygrometer is a stylish, wall-mounted device designed to accurately track maximum, minimum, and current temperatures along with humidity levels. Ideal for greenhouses and indoor environments, it operates without batteries and offers precise readings within ±1°C and 0-100% humidity range, making it an essential tool for professional gardeners and plant enthusiasts.

Specifications

ASIN	B000TAW5AY
Battery Description	No batteries required
Best Sellers Rank	7,780 in Garden ( See Top 100 in Garden ) 23 in Weather Thermometers
Brand	Brannan
Colour	Bronze Effect
Country Of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (1,379)
Global Trade Identification Number	05011405124135
Item Dimensions W x H	10.9W x 4.8H centimetres
Item Weight	0.22 Pounds
Manufacturer	Brannan
Manufacturer Part Number	12/413/3
Model Number	12/413/3
Mounting Type	Inside Mount,Wall Mount
Operating Humidity	0-100% RH
Temperature Accuracy	< 50 grados Celsius)
Temperature Reading Accuracy	plus_minus_1_degree_celsius
UPC	771948323925
Unit Count	1.0 count
Upper Temperature Rating	50 Degrees Celsius

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4691 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered 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 Iceland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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