Is two degrees hotter normal for this thermometer. The humidity is good but checkiing normal for the product.

Not normal. Accurate to within a half-degree when calibrated.

How do we select either of the 2 Certificate of Traceablitity options? Or is this already in the box?

The product does not come with a certificate & it's a hassle to obtain. The Extech website notes the following:Is my meter calibrated out of the box? How often should it be calibrated? Does it come with a calibration certificate? How & where can I get my meter calibrated?All Extech products are factory calibrated prior to shipment. This calibration is valid for one year. An annual factory calibration is recommended. Extech does not include calibration certificates with our products. NIST calibrations with data can be purchased for an additional charge for most products. To send your meter to be NIST calibrated please contact our return department for a return authorization number and other return information.

Can it display the temperature in Celsius unit?

Yes! Good question, and I did not know, so I dug out my instructions. I am now looking at those and my unit and there is a switch in the battery compartment below the battery for degrees F and degrees C. Using this, I have 78.6 F showing as 25.9 C. BTW, I'm actually considering getting another one for my car and work. It will need some protection, like a plastic sandwich box with some paper towel padding, but that will do it for me. Hope you enjoy yours as much as I like mine.

May i know does this item come together with a calibration certificate?

The calibration certificate is not included; it can be ordered together with 17030-28 calibration.

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

Help Track order

Account Cart

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

Help Track order

Account Cart

Extech 445815 Hygro-Thermometer Humidity Alert with Dew Point - Digital Humidity Monitor with Programmable Alarms, Max/Min Memory, and Calibration for Home, Greenhouse, Lab, and Office

Product ID: 2166671

Details

Battery Description
Alkaline
Brand
Extech
Color
White
Item Weight
0.19 Kilograms
Mounting Type
Wall Mount

📊Triple LCD display: humidity, temp, dew point

🔔Programmable high/low humidity alarms

🛠️Precision field calibration for lasting accuracy

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

¥22857

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Details

Battery Description
Alkaline
Brand
Extech
Color
White

Description

🌡️ Master your microclimate with precision and style!

STAY AHEAD OF MOISTURE RISKS - Customizable audible & visual alerts keep your environment in check 24/7.
PRO LEVEL ACCURACY YOU CAN TRUST - Field calibration lets you fine-tune sensor precision for consistent, reliable data year after year.
ALL IN ONE ENVIRONMENTAL DASHBOARD - Simultaneously track humidity, temperature, and dew point on a large, easy-to-read screen.
VERSATILE PLACEMENT MAXIMUM CONTROL - Use the swivel stand or wall mount to optimize monitoring in any space, from greenhouses to labs.
DEW POINT INSIGHT FOR MOLD PREVENTION - Integrated dew point calculation helps you proactively avoid condensation and structural damage.

The Extech 445815 Hygro-Thermometer is a professional-grade digital humidity monitor featuring programmable alarms, triple LCD display of humidity, temperature, and dew point, plus precision field calibration. Designed for diverse environments like homes, greenhouses, labs, and offices, it offers real-time alerts and flexible mounting options to protect sensitive spaces from moisture damage and mold.

Specifications

ASIN	B000GFCN1I
Battery Description	Alkaline
Best Sellers Rank	#225,498 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Humidifier Humidity Meters #260 in Humidifier Accessories
Brand	Extech Instruments
Brand Name	Extech Instruments
Color	White
Customer Reviews	4.2 out of 5 stars 262 Reviews
Global Trade Identification Number	00793950458150, 04016138375534
Included Components	Built-in Stand, Wall Mount Bracket, 1 AAA battery
Item Length	4.3 Inches
Item Weight	0.19 Kilograms
Manufacturer	Extech
Model	445815
Mounting Type	Wall Mount
Operating Humidity	10 to 99% RH
Part Number	445815
Temperature Accuracy	1 degree Celsius
Temperature Reading Accuracy	plus_minus_1_degree_celsius
UPC	885866191235 793950458150
Unit Count	1.0 Count
Upper Temperature Range	140 Degrees Fahrenheit
Voltage	1.5 Volts
Warranty Description	1 Year Parts and Labor

Reviews

J**E

17.06.2025

C**R

11.05.2013

D**K

16.09.2013

C**R

20.06.2022

L**S

6.07.2014

J**.

7.12.2016

M**.

4.04.2016

J**N

23.01.2024

U**5

14.01.2017

R**W

13.11.2014

M**E

29.08.2016

M**O

5.01.2017

M**J

15.01.2020

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.