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.

445815 | Desertcart Cook Islands

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

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NZ$471

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Sold byAmazon Cook IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌡️ Master your microclimate with precision and style!

PRECISION THAT LASTS - Professional-grade field calibration ensures your readings stay accurate year after year, unlike disposable sensors.
STAY AHEAD OF MOISTURE RISKS - Programmable high/low humidity alarms keep you instantly informed to protect your space from damage and mold.
REMOTE PROBE FOR HIDDEN SPOTS - Extend your monitoring reach with an 18-inch remote probe—perfect for behind walls or hard-to-access areas.
ALL IN ONE ENVIRONMENTAL DASHBOARD - Simultaneously track humidity, temperature, and dew point on a large, easy-to-read triple display—no menu toggling needed.
VERSATILE PLACEMENT MAXIMUM CONTROL - Use the built-in swivel stand or wall mount bracket to position your monitor exactly where climate stability matters most.

The Extech 445815 Hygro-Thermometer is a professional-grade humidity and temperature monitor featuring a triple LCD display for simultaneous readings of humidity, temperature, and dew point. It offers programmable audible and visual alarms to alert you when conditions stray from your set parameters, helping prevent mold and moisture damage. With a built-in calibration pot, it ensures long-term accuracy, while flexible mounting options and an 18-inch remote probe provide versatile placement for comprehensive environmental monitoring.

Specifications

ASIN	B000GFCN1I
Battery Description	Alkaline
Best Sellers Rank	#233,704 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #34 in Humidifier Humidity Meters #392 in Humidifier Accessories
Brand Name	Extech Instruments
Color	White
Customer Reviews	4.2 4.2 out of 5 stars (266)
Global Trade Identification Number	00793950458150, 04016138375534
Included Components	Built-in Stand, Wall Mount Bracket, 1 AAA battery
Item Highlight	Programmable alarms, dew point, triple display, MIN/MAX, field calibration pot, remote probe
Item Length	4.3 inches
Item Weight	0.19 kg
Manufacturer	Extech
Model	445815
Mounting Type	Wall Mount
Number of Items	1
Number of Packs	1
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 Count
Upper Temperature Range	140 °F
Voltage	1.5 volts
Warranty Description	1 Year Parts and Labor

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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.

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