TT7000 - TraceTek Sensing Cable Sulphuric acid (Sulfuric Acid) and Nitric Acid
This specifically developed TT7000 sensing cable that is able to withstand exposure to rain without any reaction, yet able to react to a concentrated acid spill quite quickly.
All of our sensor cables are able to report the location of any spill they detect to an accuracy of +/- 1 meter.
The sulfuric acid sensor cable is designated TT7000
The response times for this sensor cable (all at 20C) are as follows:
- 98% H2SO4 - 40 seconds
- 95% H2SO4 - 1 minute
- 90% H2S04 - 1 minute 15 seconds
- 75% H2SO4 - 6 hours 34 minutes
- 50% H2SO4 - No response
TT7000 is well suited for detection and location of leaks for concentrated sulfuric acid, but quite resistant to low concentrations that might be anticipated from atmospheric conditions near operating acid works.
This cable can be installed on the bottom side of outdoor, single wall pipe (affixed at the 6 0’clock position). There is no need to spiral the cable on the horizontal runs, however it would be spiraled on vertical pipe runs. For pipes laying on the ground or buried, the cable must be positioned beneath the pipe since the acid has such a high specific gravity, that it will flow downward even if the pipe is surrounded by high ground water.
Instrumentation and monitoring is accomplished with relatively small interface units called TT-SIMs. There are several models to select from based on voltage available, need for local relay signals, need for local location display, etc. However, their primary purpose is to provide the excitation voltage to the sensor cable, and then to monitor voltage and current returning from the cable to determine any cable damage or leak detections with their locations.
The output of the TT-SIM units is RS-485 Modbus serial data. Typically the pipe system is broken up into logical subsections. Each section has its own sensor cable and SIM unit. The SIM’s are connected together and back to a control room location via a two-wire RS-485 daisy chain. In the control room the user interface is provided by a dedicated Alarm and Display panel called a TTDM or the SIMs can be directly monitored with Windows type software running on a PC. (or a combination of both a dedicated alarm panel and PC software).
