Skip to content


RT8B Thermometer: Asphalt Paving & Roadstone Industry
RT8B is a non-contact infrared thermometer for use in many low temperature applications. It helps asphalt paving or roadstone producers meet state, national and environmental quality compliance requirements and glass manufacturers meet quality compliance requirementsin multiple standalone applications.
  • Overview +

    Required to help manufacturers meet the increasing demands for tighter quality control and comply with quality assurance schemes to ensure that material leaving the site is within specification, RT8B measures the temperature of materials throughout the production process. 

    AMETEK Land’s non-contact infrared technology provides a faster, superior measurement to unreliable thermocouple technologies, ensuring product quality, while the RT8B integrates easily into a wide-range of low-cost recorders and controllers. 

    The RT8B is the ideal choice for helping maintain process and quality control within all rugged low temperature applications like Asphalt paving /roadstone plants, able to provide measurements on applications including drier exit chute, mixed material, coated mixer exit, drum mix asphalt plants, and hot storage bins.  For glass plans, on applications including lehr exit, cooling and laminar cooling. 

    By accurately and reliably measuring the temperature of the material during production, process control can be improved, providing substantial energy savings. These precision measurements also assure quality, increasing production rates. 

    Specifically designed for all applications in the Asphalt paving and roadstone industry, the RT8B has a linear, industry standard 4-20mA output signal, so it interfaces easily with all types of low-cost indicators, controllers and recorders. It also offers a 12-month warranty. 

    Unlike traditional thermocouples, the RT8B offers a fast-response temperature measurement which gives better control. By not being in contact with the product, it avoids the damage and wear that leads to constant replacement or repair. 

    The RT8B is an ideal non-contact temperature measurement solution for the roadstone and glass industry.
  • Specifications +

    Measurement Range: Operating Specified
    RT80B 0 to 250 °C 0 to 250 °C
    RT81B 0 to 500 °F 30 to 500 °F
    RT82B 0 to 500 °C
    0 to 500 °C
    RT83B 0 to 1000 °F 30 to 1000 °F
    RT84B 100 to 600 °C 100 to 600 °C
    RT85B 200 to 1100 °F 200 to 1100 °F
    Spectral Response: 8 to 14 μm (nominal)
    Output: 4 to 20 mA, 2-Wire Loop Connection
    Emissivity Adjustment 0.10 to 1.09. Steps of 0.01
    Response Time: 1 to 10 Seconds Adjustable (0 to 95 %)
    Resolution: <0.1 °C/0.2 °F
    Accuracy: 2 °C / 0.5 % of span (whichever is higher)
    Ambient Temperature Limits:
    -5 to 50 °C/23 to 122 °F (Specified)
    -5 to 70 °C/23 to 159 °F (Operating)
    Drift with Ambient Temp:
    <1.5 °C per 10 °C/<1.5 °F per 10 °F
    Drift with Time: <1 °C/2 °F per year
    Power Supply: 11 to 45 V d.c., 2-Wire Loop Connection
    Load Resistance: 1 Kohm Max
    Vibration: 3G Any axis, 10 to 300 Hz
    EMC: EN 50081-1 (Emissions), EN 50082-2 (Immunity), EN 61010-1 (Electrical Safety)
    Sealing: To requirements of IP65/NEMA4X
    Weight: 1.4 kg/3.0 lb

    For further technical specification information please refer to the specific product brochure within the Documentation section below.

  • Documentation +

  • Related Applications +

    • Air Cooling (Flat)
      Air Cooling

      Air nozzles must cool the glass in a uniform way before it is cut to size. Our recommended solutions are the LSP-HD 61 linescanner and RT8 thermometer.

      Keep Reading

    • Batch Inlet
      Batch Inlet

      Measurement at the batch inlet provides thermal monitoring of the glass raw materials for quality control. We recommend the LWIR-640 thermal imager or RT8 thermometer for this application.

      Keep Reading

    • Cutting

      Measurements at this stage ensure safe cutting and provide a quality control check. We supply the LSP-HD 60 linescanner and RT8 thermometer for this application.

      Keep Reading

    • Asphalt / Roadstone / Tarmac - Mixer and Chute
      Mixer and Chute

      Fluctuations in mix temperature can result in substandard product and batch rejection. The RT8B Roadstone Thermometer is AMETEK Land’s specifically designed solution for this application.

      Keep Reading