Issue Date: November 22, 2004

Robertshaw Industrial Products

Centeron High Level Alarm System
(SM Series Switch Monitor with Centeron FSL Series Float Switches:
Models *FSL AAA BB CC DD EE 0 and *FSL AAA BB CC DD EE C)

Interstitial Detector (Liquid-Phase)

Detector

Output Type Qualitative
Sampling Frequency Continuous
Operating Principle Reed switch

Test Results

Model *FSL AAA BB CC DD EE 0

  Unleaded Gasoline Diesel Water
Detection time (sec) <1 <1 <1
Fall time (sec) <1 <1 <1
Minimum product level (in) 0.883 0.895 0.809

Model *FSL AAA BB CC DD EE C

  Unleaded Gasoline Diesel Water
Detection time (sec) <1 <1 <1
Fall time (sec) <1 <1 <1
Minimum product level (in) 0.902 0.893 1.70

Comments

*FSL AAA BB CC DD EE X indicates switch models where:

  • "AAA" represents the switch assembly nominal length in inches;
  • "BB" represents the nominal wire harness length in feet;
  • "CC" represents the housing material;
  • "DD" represents the float material;
  • "EE" represents the mounting threads (if applicable);
  • "X" where a "C" in this position indicates that the assembly is designed to be suspended by its cable, otherwise this character will be "0".

The FSL series switches alone were evaluated at the bottom of the test chamber.
The evaluator states that the switch mechanism can be suspended from the top of a tank or other location where a high level alarm is needed. Depth of the liquid will therefore differ from levels reported.
The evaluator reports that the FSL series switches meet the requirements for level sensors installed in tanks, sumps, interstitial spaces or other configurations where the presence of liquid needs to be indicated.
The FSL series switches are connected to the switch monitor. An alarm signal is transmitted by radio frequency (RF) to the alarm console where the condition of the sensor is indicated.
The evaluator reports that alarm information from the switch monitor can also be received by a Centeron TC series controller which can relay sensor condition by phone line to the Centeron Data Collector for remote data access over the Internet. Transmission of the RF signal to the controller was not evaluated.

  • Robertshaw Industrial Products
    1602 Mustang Drive
    Maryville, TN 37801
    Tel: (800) 237-7429
    E-mail: centeron@rsipd.com
    URL: www.centeron.net
  • Evaluator: Ken Wilcox Associates
    Tel: (816) 443-2494
    Date of Evaluation: 10/07/03

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