• Temp:-20°C ~ 60°C (-4°F ~ 140°F );
  K-type: -200°C ~ 1,370°C (-328°F ~ 2,498°F);
  Humidity: 0 ~ 100% RH
• 4 Digit, Triple display.
  
• K-type Termocouple.
  
• Reading hold °C or °F annunciators.
  
• MAX, MIN. function.
  
• Auto power off.
  
• ΔREL function.  (DTM-321)
  
• Automatic low battery indication.
  
• RS-232 computer interface.
  
• RS-232 cable or USB cable and software for Windows(Options).
  

Price: USD $ 213.00

Specifications model  DTM-321:

Measurement Range   
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
Response Type Humidity: 75 s (in slow moving air)
Temperature T1: 40 sec in slowing moving air
Sample Rate 1 time per second
Input Protection: 60V DC or 24V rms AC Maximum
Record (Datalogging) 16,300 Points (Model DTM-322)
Datalogging Interval 00m: 01s to 59m: 59s (Model DTM-322)
Operating Temp. & Humidity  
0 °C   ~ 50 °C  (32  ~ 122°F ) & 0 ~ 90% RH Non-condensing)
Storage Temp. & Humidity
0 ~ 60 °C (14 ~ 140°F  )& 0~80% RH Non-condensing
Power Supply 9V NEDA 1604 Battery
(Optional adapter ADP-01 110V, ADP-02 220V)
Battery Life Approximately 100 hrs (Alkaline)