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The POTTER ELECTRIC SIGNAL CO. US STS-2.5 is a 2.5-foot sampling tube designed for use in air sampling smoke detection systems. Sampling tubes draw air from a protected space and route it to a detector head for analysis, enabling early smoke detection before visible combustion products accumulate. This component is a standard accessory in fire detection installations and is typically handled by licensed fire alarm technicians and life safety contractors during system commissioning or service.
The STS-2.5 sampling tube is suited for residential and light commercial fire detection applications where air sampling is required at shorter distances or in confined zones. It is installed as part of a complete air sampling detector assembly, extending the system's reach into ceiling plenums, equipment enclosures, or other monitored areas that require spot-specific air sampling capability.
Designed as an OEM-style accessory for use with compatible air sampling smoke detection systems requiring a 2.5-foot sampling tube. No specific compatible model numbers were provided in the product data.
Installation should be performed by a licensed fire alarm technician in accordance with NFPA 72 and applicable local fire codes. Disable and lock out the fire alarm control panel circuit serving the detection system before servicing any sampling tube or detector assembly. Ensure tube placement follows the detector manufacturer's layout specifications for proper airflow and sampling coverage. Do not modify tube length in the field, as changes may affect system sensitivity and listed performance.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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