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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ST02 Stainless Steel HVAC/R Pocket Dial Thermometer, 0 to 220F

ST02 Stainless Steel HVAC/R Pocket Dial Thermometer, 0 to 220F

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

⏱️500ms fast response

🌡️0-220°F precision range

R266

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Description

🌡️ Stay cool, stay precise — the pro’s pocket powerhouse!

INSTANT TEMP CHECKS - Quick 500ms response for real-time HVAC diagnostics
BUILT FOR TOUGH JOBS - Durable stainless steel & waterproof design withstands harsh environments
PRECISION YOU CAN TRUST - Calibratable dial ensures accurate readings from 0°F to 220°F
POCKET READY PORTABILITY - Slim 5" stem with protective sheath and clip keeps it handy on the go
VERSATILE HVAC ESSENTIAL - Perfect for AC, refrigeration, appliance, and vehicle cooling system checks

The Supco ST02 is a rugged, stainless steel pocket dial thermometer designed for HVAC/R professionals. Featuring a fast 500ms response time, a clear 1" analog dial calibrated from 0°F to 220°F, and waterproof construction, it delivers reliable temperature readings in demanding environments. Its 5" stem and protective sheath with clip make it ultra-portable for field diagnostics, ideal for air conditioning, refrigeration, appliance servicing, and vehicle cooling system monitoring.

Specifications

ASIN	B003CL9LMC
Additional Features	Waterproof
Age Range Description	Adult
Best Sellers Rank	#4,704 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Dial Thermometers
Brand Name	Supco
Color	Silver
Customer Reviews	4.6 4.6 out of 5 stars (2,321)
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	ST02
Outer Material	Stainless Steel
Part Number	ST02
Power Source	Battery Powered
Product Care Instructions	Do Not Soak, Wipe Clean
Response Time	500 milliseconds
Reusability	Reusable
Specification Met	RoHS
Style Name	Classic
UPC	687152032525
Unit Count	1 Count
Upper Temperature Range	220 °F

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R266

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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