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ROADSTONE THERMOMETER - RT8A
Roadstone Thermometer - RT8A  
Today's roadstone plants are facing ever increasing demands for tighter quality control and many have now introduced quality assurance schemes to ensure that material leaving the site is within specification.

The temperature of the material, both during production and prior to leaving the site is measured as part of this quality requirement.



  
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Roadstone Plant   Temperature measurement of the material during production can improve the control of the process and give significant savings in energy costs.

Temperature measurement using thermocouples are not recommended because the slow response time introduces lags in the system, which ultimately results in poor control. Damage and wear caused by being in contact with the product means that thermocouples are unreliable and have constantly to be replaced.

LAND developed non contact infrared thermometers for this application and have over 30 years experience in the roadstone industry. The RT8A with its linear, industry standard 4 to 20mA output signal, interfaces with all types of low cost indicators, controllers and recorders.

RT8A thermometer features and benefits:
Faster response.
No interference with the material or process, or damage to the measuring system.
Accurate, reliable and stable temperature measurement to aid product quality control.
Saves energy and heating costs.
Maximizes production rates.

The Roadstone Thermometer can be used on all roadstone applications:
Drier exit chute for measurement and control of aggregate temperature.
Mixed material temperature in the mixer.
Coated roadstone mixer/storage bin exit.
Drum mix plant, coated material temperature at the collector box (drum exit).

  Specification  
  Measurement range:
    RT80A
    RT81A
    RT82A
    RT83A		 Operating
0 to 250°C
0 to 500°F
0 to 500°C
0 to 1000°F		 Specified*
0 to 250°C
30 to 500°F
0 to 500°C
30 to 1000°F
  Spectral Response: 8 to 14µm
  Output: 4 to 20mA, 2-wire loop connection
  Emissivity Adjustment: 0.10 to 1.09 in 0.01 increments
  Response Time: 1 to 10 seconds adjustable
  Resolution: <0.1°C/0.2°F
  Accuracy (absolute): 0.5% of span*
  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 45V d.c., 2-wire loop connection
  Load resistance: 1Kohm max.
  Vibration: 3G any axis, 10 to 300Hz
  EMC: EN 50081-1 (emissions), EN 50082-2 (immunity), EN 61010-1 (electrical safety)
  Sealing: To requirements of IP65/NEMA4X
  Weight: 1.4kg/3.0lb
   
  *Within specified measurement range  

If you would like more detailed product information please use the Further Information page.

A literature download on the Roadstone thermometer is available
Last Modified (30/03/06) (156KB).
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