Table 1. Temperature-voltage relationship for Type-K thermocouple with reference junction at 32° F.

Temperature (°F)	EMF (mV)	Temperature (°F)	EMF (mV)
100	1.52	150	2.66
200	3.82	250	4.97
300	6.09	350	7.20
400	8.31	450	9.43
500	10.57	550	11.71
600	12.86	650	14.02
700	15.18	750	16.35
800	17.53	850	18.70
900	19.89	950	21.07
1000	22.26	1050	23.44
1100	24.63	1150	25.81
1200	26.98	1250	28.15
1300	29.32	1350	30.49
1400	31.65	1450	32.80
1500	33.93	1550	35.07
1600	36.19	1650	37.31
1700	38.43	1750	39.53
1800	40.62	1850	41.70
1900	42.78	1950	43.85
2000	45.96	2050	48.03

Table 2. Temperature correction for reference junction above 32° F.

Reference junction °F	60	70	80	90
Correction	0.62	0.84	1.06	1.29

Add Correction to meter reading when making temperature measurement.

Subtract Correction from EMF when selecting a target setting.

From "Kiln Temperature Measurement for Jacks or How to make a $12 Digital Pyrometer" by Wallace Venable