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By certification 
temperature deadband Type
F120, 820E, 822E: typically 1%; type B-, C-, and E- 121 and 122: typically 2% of
range under laboratory conditions (70°F [21°C] ambient circulating bath at rate of
1/2°F per minute change)
Pressure deadband
See Individual model charts on pages 5-14
Differential pressure :
Differential pressure indication available types H121K and H122K with option M210
indicator (option m210) (check model availability under options); accuracy approximately
1% mid 50% of range,3% at ends; window is plexiglass and gasketed; indicator may be field adjusted for
approximately ±1% accuracy at any set point within range
Temperature indication:
Temperature indication available types 820E and 822E. Indication accuracy is ±1% of
adjustable range
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