External Black Bulb Sensors


The PTT-635 sensor is used for radiant heat in outdoor spaces. Black bulb temperature sensors are used to calculate comfort temperature which is specified as the average of the conductive temperature and the radiant temperature. Units contain either a high quality thermistor, platinum or nickel sensing element.


- Wide range of element types
- IP65 Protection Index


Outputs types: Thermistor resistive
  Current 4 to 20 mA
  Voltage 0 to 10Vdc or 0 to 5Vdc
Ambient range: -30 to +70 ° C (-22 to 158 ° F)
Material: Housing ABS (flame retardant)
  Black Bulb Anodised aluminium
Dimensions: Housing 116 x 106 mm
  Black Bulb 17,5 x 37mm de dia
Protection: IP65
Weight: 160 g


Models & Accessories
Passive Output
PTT-635-A10K3A1, Trend, Seachange, Cylon, Distech
PTT-635-B10K4A1, Andover
PTT-635-C20K6A1, Honeywell
PTT-635-DPT100A, Serck
PTT-635-EPT1000A, Cylon
PTT-635-FNi1000A, Sauter
PTT-635-GNi1000A/TCR (LAN1), Siemens
PTT-635-HSAT1, Satchwell
PTT-635-M2,2K3A1, Johnson Controls
PTT-635-N3K3A1, Alerton
PTT-635-P30K6A1, Drayton
PTT-635-Q50K6A1, Ambiflex
PTT-635-SSAT2, Satchwell
PTT-635-TSAT3, Satchwell
PTT-635-WSIE1, Siebe
PTT-635-YSTA2, Landis & Staefa
PTT-635-Z10K NTC, Carel
PTT-635-DCDelta Controls
Active Output
PTT-635-CVO4-20mA/0-10 Vdc selectable output,
Output ranges:
0 to + 40 ° C or
-10 to 110º C
PTT-635-CVO-C4-20mA/0-10 Vdc selectable output,
Specific calibration in the range of:
-30 to 70º C


To download the product datasheet, please click the links below:

Pulpit rock
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