U.S. microwave traffic detector Ramsay DTR131 

 Ramsey (Thermo Ramsey) DTR131 microwave traffic detection 
 DTR131 use of the Doppler effect is a non-contact microwave motion detectors. DTR131 can measure 
 Between microwave emission and reflection of microwave frequency are different. Received microwave energy can change (for example, 
 Accumulation of material in front of the antenna) to have the material flow / no flow detection material has no effect. 
 Detection range: 0-5 feet (depending on use) 
 Operating frequency (microwave): 24.124GHz 
 Maximum Working Pressure: 15psi 
 Ambient temperature: -20 ~ 60 ℃ 
 Sensor surface maximum temperature: 80 ℃ 
 Supply voltage: 220VAC/50Hz 
 Relay output contacts: 4A/500VA/250V 
 Switch delay: 2-10 seconds 
 Shell material: Aluminum 
 Ex certification: FM approved, dust, fire grade Ⅱ, Div.1, GrpsE-G