what is the difference between the yellow and the blue ?

If the “blue” reference is the thermocouple with white and blue sheathing, it’s only the material covering the K thermocouple. Both sets are “K” thermocouple.

I need to order separate k-probes in the 500c range, doe this use the standard "mini-connector" for the probes?

Yes, it is mini K-Type connector with flat-pin.

Is the included 1.9V battery rechargable?

Hi, it comes with 9V battery and it's not rechargeable

How long are the wires for probes or other type?

Hi, the cable length of the Bead-type K-type Thermocouples is about 95cm/37.4" and for the Stainless Steel Type K-type Thermocouples is 90cm/35.4".

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Thermocouple Thermometer Digital K Type Dual Channel Thermometer HVAC Temperature Meter with 4 Thermocouples, MAX/MIN/AVG Temperature Measurement, -50~1300°C (-58~2372°F)

Thermocouple Thermometer Digital K Type Dual Channel Thermometer HVAC Temperature Meter with 4 Thermocouples, MAX/MIN/AVG Temperature Measurement, -50~1300°C (-58~2372°F)

Product ID: 115944645

Details

Age Range (Description)
Adult
Brand
Gain Express
Color
Blue1
Connectivity Technology
Usb
Display Type
Digital
Included Components
Battery Pouch

🔢Dual channel with differential display

🌡️Wide -50°C to 1300°C range

🛡️Silicon rubber holster protection

¥9986

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Description

🌟 Master temperature like a pro—measure, compare, conquer!

BUILT TO LAST - Durable silicon rubber holster guards against drops and wear, ensuring your investment stays protected on the job.
READY OUT OF THE BOX - Includes 4 thermocouples (2 bead type, 2 stainless steel) to cover diverse applications—no extra purchases needed.
DUAL CHANNEL DYNAMICS - Simultaneously monitor two temperature points and instantly see their difference for smarter HVAC diagnostics.
PRECISION MEETS POWER - Accurately measure extreme temps from -50°C to 1300°C (-58°F to 2372°F) with industrial-grade K-type thermocouples.
USER FRIENDLY PORTABLE - Compact, battery-powered design with foldable stand and intuitive 6-button interface—perfect for pros and beginners alike.

The Gain Express 68022_2P Digital K-Type Thermocouple Thermometer is a versatile, dual-channel HVAC tool featuring 4 included thermocouples, a broad temperature range from -50°C to 1300°C, and a rugged silicon rubber holster. Designed for precision and ease, it offers selectable °C/°F/K modes, max/min/avg readings, differential temperature display, and a portable, battery-powered build ideal for professionals and enthusiasts seeking reliable, on-the-go temperature measurement.

Specifications

ASIN	B07P8NWH67
Additional Features	Selectable °C, °F & K, Auto Shut-OFF
Age Range Description	Adult
Best Sellers Rank	#60,305 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #28 in Lab Digital Thermometers
Brand Name	Gain Express
Color	Blue1
Connectivity Technology	Usb
Customer Reviews	4.0 4.0 out of 5 stars (963)
Display Type	Digital
Included Components	Battery, Pouch, User Guide
Indoor Outdoor Usage	Indoor
Inner Material	Stainless Steel
Item Length	5.87 inches
Manufacturer	Gain Express Holdings Ltd.
Model	68022_2P
Model Name	68022_2P
Number of Batteries	1 9V batteries required.
Outer Material	Stainless Steel
Part Number	68022_2P
Power Source	Battery Powered
Product Care Instructions	Wipe Clean
Resolution	0.1 degrees_celsius
Response Time	0.5 seconds
Reusability	Rechargeable
Style Name	Contemporary
UPC	600316549844
Unit Count	1 Count
Upper Temperature Range	1300 °C

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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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¥9986

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

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TrustScore 4.5 | 7,300+ reviews

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