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MAX31855 Production
The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in...
Datasheet
MAX31855 on Analog.com

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How many MAX31855 ICs can be connected to a single SPI master?

The MAX31855 SO pin is high-impedance when /CS is inactive so you can have the SCK and SO pins common to as many MAX31855 devices as you want, you will just need to have separate /CS control for each chip.
Tags: Digital Temperature Sensors 000096030 MAX31855 Integrated/Special Purpose A/D Converters MAX31855EASA+