Humidity 0% ~ 100% RH
Temperature T1: -20°C ~ 60°C (-4°F ~ 140°F )
(K-Type) T2: -200°C ~ 1,370°C (-328°F ~ 2,498°F);
Resolution 0.1% RH  0.1°C  (0.1 °F)
Accuracy
Humidity +-2.5% RH (@ 25 °C  / (77°F)    , 30 ~ 95% RH)
Temperature  (+-0.7 °C  , 1.4  °F  )
(K-Type)    :+-0.3% rdg + 1  °C    +-0.3% rdg + 2 °F
Sensor Type Humidity: Precision capacitance sensor
Temperature: T1: Semiconductor sensor
T2: K-type Thermocouple
;/span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li/ulbspan%20style=font-size:%20small;K-type:%20-200°C%20~%201,370°C%20(-328°F%20~%202,498°F);Humidity:%200%20~%20100%%20RH/span/bul%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;4%20Digit,%20Triple%20display./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;K-type%20Termocouple./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;Reading%20hold%20°C%20or%20°F%20annunciators./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;MAX,%20MIN.%20function./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;Auto%20power%20off./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;ΔREL%20function./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;  (DTM-321)/span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;Automatic%20low%20battery%20indication./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;RS-232%20computer%20interface./span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;/span/b/li%20libspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small;RS-232%20cable/span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small; or%20USB%20cable/span/bbspan%20style=color:%20#000000;%20font-family:%20Arial;%20font-size:%20small; and%20software%20for%20Windows/span/b/li/ul&media=https://kissidoff.com/wp-content/uploads/2026/07/create-from-blank-custom-2023-04-03T110201.918.png){kind=link}