Several measurements combined compactly in one sensor:

    • Remote temperature measurement
    • Unique correction of the error caused by the emissivity of the road surface, negating the need for emissivity adjustment
    • Easy installation and service
    • Low maintenance costs
    • No internal moving parts
    • Stable measurement results even with intense traffic
    • Weather-proof, durable design
    • Reports air temperature and humidity
    • Easy integration with Vaisala ROSA Road Weather Station
    • Capability to act as stand-alone device in remote locations with solar/gsm options
    Technical Specifications

     Technical Specifications


    Power supply 9 ... 30 VDC
    Power consumption 33 mW
    DST111 Isolated RS-485
    DST111R RS-232
    Connector M12 (5 pins)
    DST111 RS-485 and power, male
    DST111R RS-232 and power, male


    Operating temperature -40 ... +60 °C
    Operating humidity 0 ... 100 % RH
    CE Compliant IEC(EN)-61326
    Vibration IEC 60721-3-3


    Measuring distance 2 ... 15 m
    Measuring area Diam. 80 cm at 10 m
    Installation angle from the horizontal line 30 ... 85°

    Measuring range

    Resolution 0.1 °C
    Surface temperature -40 ... +60 °C
    Time constant 1 min
    Data refresh time 30 s


    Dimensions (cm) 32 x 13 x 10
    Weight 1.6 kg

    Related Services
    • Warranty 
    • All Vaisala products and services are covered by a 12-month warranty as standard, with selected products covered for up to 24 months. During this period you benefit from free repair or replacement of faulty equipment.