Repair Parts -- new and used -- moderated newsgroup for trading > Repair Electronics
> Phase Convertors
> New chemetronics heat and fire detector model 501 brand
New chemetronics heat and fire detector model 501 brand
For Sale: New chemetronics heat and fire detector model 501 brand
Subject New chemetronics heat and fire detector model 501 brand
Ad is submitted by poster:
Chemetronics Model 501 Heat Detector
The Series 500 detector is a dual action, electric fire detection thermostat. It employs two independent methods of detection: Rate-of-Rise and Fixed-Temperature.
The rate-of-rise function detects fires that rapidly grow in intensity. This method responds to abnormally fast temperature increases.
The fixed temperature method detects fires that build temperatures to a high level at a slow rate. This method responds to a specific temperature setting.
The Series 500 detector is an "open circuit" device, designed to close an electrical circuit upon activation. The compact, simply designed unit is rugged and unaffected by vibration. All metal parts are brass or aluminum, mounted on a durable, mineral-filled, phenolic base.
No exposed metal parts carry current. The electrical contacts are all silver clad and of ample size.
Large line terminals and wire ways are provided in the base for easy installation in either open wiring or concealed wiring systems.
The Rate-of-Rise element consists of an air chamber, flexible metal diaphragm and restricted orifice vent that can be closely calibrated to control air flow rate in and out of the chamber.
The Air Chamber expands and contracts as ambient room temperature changes. Under normal temperature fluctuations, the unit "breathes" through the Calibrated Vent. Under rapid temperature rise conditions, air expands faster than it can be vented, building up enough pressure to move the thin Metal Diaphragm until the flexible Silver Contact closes the electrical circuit against the Stationary Contact. When the heat is removed, the pressure is relieved through the vent and the contacts are restored to normal.
The Fixed Temperature element is entirely independent of the Rate-of Rise. It consists of a phosphor-bronze spring held under tension by standard fusible solder. The Spring is held under tension by a spot of fusible Eutectic Alloy. When heated to its rated temperature, the alloy melts which releases the Spring and closes the contacts.
* Where life safety is involved, smoke detectors
* Heat detectors should be used for property
* Reliance should not be placed solely on
heat detectors for life safety
* Detectors must not be painted
* Heat detectors should be electronically
supervised with battery backup at the panel
* 6-125 Volts A.C., 3.0 Amps
* Listed by Underwriters Laboratories (UL)
* Factory Mutual Approved (FM)
* California State Fire Marshal Approval (CSFM) #7270-1582:101
* City of New York (MEA) Listing No. 188-94-E
* Listed by Underwriters' Laboratories of Canada (ULC)
repair--parts.com bears NO responsibility for this ad. Please report ads that do not follow our
rules (on front page).
Posted By: Manuel Cabrera
Contact: ManuelCabrera@repair--parts.com (Manuel Cabrera) (this is a temporary forwarding address).
