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TT-635 External Black Bulb Sensor

TT-635 External Black Bulb Sensor

Quick Overview

The TT-635 black bulb sensors are used for radiant heat monitoring 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. Sensors are supplied in a white snap shut enclosure with an IP65 rating when fully secured.
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  • Black bulb to measure radiant heat
  • Wide range of sensing elements available
  • TT-332 version includes a PTFE radiation shield to minimise the effects of direct sunlight
  • Weatherproof housing, IP65


Output types: Resistive
Housing material: ABS (flame retardant)
Dimensions: 116 x 106 x 52mm
Black Bulb: Anodised Aluminium, 17.5 x 37mm diameter
Ambient range: -30 to +70°C

IP54 with snap-shut lid
IP65 with lid screwed shut
Weight: 160g
Country of Origin: UK

Note: The TT-635 sensors enclosure only has an IP54 rating when the lid is snapped shut. Using the additional two screws to secure the lid improves this rating to IP65 and allows the sensor to be used outdoors. 

Availability: Stock Item


Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

TT-635-D Black Bulb Sensor suitable for monitoring temperature in an external environment. PT100A (Serck) temperature sensing element housed in a 37mm diameter Anodised Aluminium black bulb in the lid of a snap shut housing. Connections via 2-way terminal block using screened cable.
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