Will this give accurate readings of ambient air temperature?

Yes, but you would have to have the tip off of a table or whatever that might be a different temperature and hold it in your hand by the dial. All of these are able to be calibrated. Put in a cup of ice and set the dial to 33°.

What country is this made in?

The company Supco is located in Bronx, NY at Supco.com, had it awhile, still works well if that helps.

can this be calibrated by nut on back for rotating dial?

I believe so. There is a nut on the back, but I haven't had to recalibrate mine yet.

What is the diameter of the stem? I've got a 3/16" hole that I'd like it to fit into

The one I have measures .150", so it should easily fit into a 3/16" hole which is .1875".

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Supco ST02 Stainless Steel Pocket Dial Thermometer, 5" Stem, 1" Dial, 0 to 220 Degrees F

Product ID: 6669158

Details

Age Range (Description)
Adult
Brand
Supco
Color
Silver
Display Type
Analog
Included Components
Storage Case
Outer Material
Stainless

💧Waterproof stainless steel

📏5" precision stem

⏱️500ms fast response

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¥2940

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌡️ Stay cool, stay precise — the ultimate pocket thermometer for the savvy pro!

POCKET SIZED POWER - Compact 1-inch dial with large numerals and a flexible clip case for on-the-go professionals.
BUILT TO BRAVE THE ELEMENTS - Durable waterproof housing ensures reliable use in refrigerators, freezers, and air conditioners.
INSTANT READINGS ZERO WAIT - Ultra-fast 500 millisecond response time keeps you ahead of the curve.
PRECISION AT YOUR FINGERTIPS - 5-inch stainless steel stem for accurate temperature readings deep inside appliances.
STAY CALIBRATED STAY CONFIDENT - Easy recalibration adjustment guarantees consistent accuracy over time.

The Supco ST02 Stainless Steel Pocket Dial Thermometer features a 5-inch stainless steel stem and a 1-inch easy-to-read dial, delivering fast 500ms response times across a temperature range of 0 to 220°F. Waterproof and built for durability, it includes recalibration adjustment and a flexible clip case, making it ideal for precise temperature monitoring in refrigerators, freezers, and air conditioners.

Specifications

ASIN	B003CL9LMC
Additional Features	Waterproof
Age Range Description	Adult
Best Sellers Rank	#9,554 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Dial Thermometers
Brand Name	Supco
Color	Silver
Customer Reviews	4.6 4.6 out of 5 stars (2,295)
Display Type	Analog
Global Trade Identification Number	00687152032525
Immersion Depth	5 Inches
Included Components	Storage Case
Indoor Outdoor Usage	Indoor
Item Length	5 Inches
Item Weight	13.61 g
Manufacturer	Supco
Model	ST02
Model Name	Supco ST02
Outer Material	Stainless Steel
Part Number	ST02
Power Source	Battery Powered
Product Care Instructions	Freezer Safe, Hand Wash Only
Response Time	500 Milliseconds
Reusability	Reusable
Specification Met	RoHS
Style Name	Classic
UPC	687152032525
Unit Count	1.0 Count
Upper Temperature Range	220 Degrees Fahrenheit

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