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)

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 4 thermocouples

⏱️0.5s fast response time

🌡️Wide -50°C to 1300°C range

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Description

🌟 Stay ahead of the heat curve with precision you can trust!

INSTANT INSIGHTS - Ultra-fast 0.5 second response lets you capture real-time temperature changes without delay.
MULTI POINT MASTERY - Simultaneously monitor two channels with 4 included thermocouples for versatile HVAC or lab use.
PRECISION MEETS POWER - Measure extreme temps from -50°C to 1300°C with pinpoint 0.1°C resolution.
BUILT TO LAST PROTECT - Silicon rubber holster guards against drops, extending device life for relentless fieldwork.
USER FRIENDLY PRO DESIGN - Intuitive 6-button interface, foldable stand, and factory calibration make it perfect for pros and beginners alike.

The Gain Express 68022_2P Digital K-Type Thermocouple Thermometer offers professional-grade dual-channel temperature measurement from -50°C to 1300°C. Equipped with 4 thermocouples, fast 0.5-second response, and a rugged silicon rubber holster, it’s engineered for HVAC, industrial, and scientific applications requiring reliable, real-time data with user-friendly operation.

Specifications

ASIN	B07P8NWH67
Additional Features	Selectable °C, °F & K, Auto Shut-OFF
Age Range Description	Adult
Best Sellers Rank	#58,449 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #22 in Lab Digital Thermometers
Brand Name	Gain Express
Color	Blue1
Connectivity Technology	Usb
Customer Reviews	4.1 4.1 out of 5 stars (955)
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	1.0 Count
Upper Temperature Range	1300 Degrees Celsius

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