Electric Air Heating Batteries - 
Heating Rods - Heating Cartridges
 Surface-Mounting Thermostat ATHs-270U  
  Temperature Range: +20°C to +150°C 
   The Double Thermostat (safety temperature limiter and temperatur monitor) for many 
   applications. The ATHs-270 U works as safety temperature limiter with manual reset 
   and as temperature monitor with automatic reset. Complies with EN-VDE requirements.
   Technical Description
   The operation of the 
   surfacemounting thermostat relies 
   upon phenomenon of liqudia expansion. 
   The volume of a liquid filled sensor 
   system (consisting of sensor, 
   capillary tubing and membrane) 
   varies with varying temperatures. 
   The resulting membrane displacement 
   actuates the mircoswitch. 
   The temperature is only sensed by 
   the themperature sensor.

   Switching Operation
   When the actual temperature exceeds limit 
   temperature the mircoswitch opens or 
   closes the electric ciruit
   by the sensor system.
   Safety temperature limiter with 
   Change  over contact.
   When the limit temperature is exceeded, 
   the electric circuit is opened (or closed) and
   the microswitch is mechanically locked.
   After the temperature has returned 
   down to the set limit the 
   microswitch can be unlocked
   manually, only.

  Temperature Monitor with Automatic Reset
   After the temperature has returned down to 
   the  hysteresis loop´s limit,
   the mirco-switch sets the circuit to 
   beginning status.

   Switch Element
   Cased mircoswitch with change over 
   contact and automatic reset..
   Cased microswitch with change over
   contact and manual reset.
Abmessungen Thermostat Jumo ATHs 270U
Anschlussbild Thermostat Jumo ATHs 270U
   Jumo ATHs-270U   
  Type Jumo ATHs-270 U ,
   TÜV certified  for compliance with 
   DIN 3440  standard, 
   system of protection IP 54 (cased)

   Application Area
   The ATHs-270 U surface mounting thermostat is 
   used as a double thermostate (safety temperature
   limiter and temperature monitor) in laboratory and 
   climatic cabinets, in furnace applications, and in
   mechanical and apparatus applications per DIN 3340
   standard. The temperature monitor with 
   changeover contact.

   Adjustable Temperature Range: 
   +20 °C  to  +150 °C