Product Description
Pro-Tech 8505 Commercial Carbon Monoxide Monitor
The Pro-Tech 8505 commercial carbon monoxide monitor is built for heated and air-conditioned workplaces. Instead of the residential UL 2034 alarm curve, its alarms are based on time-weighted average (TWA) exposure limits published by OSHA, NIOSH, ACGIH and Cal/OSHA. An electrochemical sensor samples the air every second, and the LCD continuously shows CO from 9 to 999 ppm.
Note: The Pro-Tech 8505 is not listed to the residential UL 2034 standard and is not intended to meet building or fire code requirements for CO alarms or detectors. It is not designed for vehicles, unconditioned spaces or hazardous locations as defined by the National Electrical Code.
Reasons to Buy the Pro-Tech 8505
- Alarms tied to workplace limits: Five alarm points based on TLV, REL, PEL, STEL and ceiling exposure limits, from 20 ppm over 7 hours up to 180 ppm at any time.
- Continuous low-level readout: The display shows detected CO from 9 ppm in 1 ppm steps, so staff can see readings before an alarm.
- Peak history and TWA: Recall the highest CO level detected, how long it lasted and how long ago it occurred, with 30 days of peak history and an 8-hour TWA readout.
- No wiring: Runs on one 9V alkaline battery and mounts on an interior wall, so no electrician is needed.
- Clear alarm signals: 85 dB horn at 10 feet, flashing red alarm LED and a smart backlight that turns on for alarms, testing and memory recall.
- Self-monitoring: Self-diagnostic circuitry plus a sensor life monitor that signals end of life after two years of powered operation.
Alarm Points and Workplace Exposure Limits
The 8505 alarms on CO exposure over time, not a single reading. Each alarm point activates before the related exposure limit is reached.
| 8505 alarm | Activates at | Reference limit |
|---|---|---|
| TLV | 20 ppm within 7 hours (TWA) | ACGIH TLV 25 ppm (8-hr TWA); Cal/OSHA PEL 25 ppm (8-hr TWA) |
| REL | 30 ppm within 3 hours (TWA) | NIOSH REL 35 ppm (TWA) |
| PEL | 45 ppm within 90 minutes (TWA) | OSHA PEL 50 ppm (8-hr TWA) |
| STEL | 90 ppm within 15 minutes (TWA) | Short-term exposure |
| Ceiling | 180 ppm at any time | NIOSH and Cal/OSHA ceiling 200 ppm |
These are the manufacturer's specified alarm points. Follow the owner's manual whenever an alarm occurs. The table describes device behavior; it does not define a safe exposure level.
Installation
- Mount on an interior wall about three inches above eye level.
- Large open areas: one monitor per 1,000 square feet of unobstructed space. Separate rooms may need their own monitor.
- Keep at least 5 feet from combustion and cooking appliances.
- Keep at least 1 foot from exterior doors and windows, and do not mount on exterior walls.
Specifications
| Specification | Pro-Tech 8505 |
|---|---|
| Sensor | Electrochemical with integrated nuisance-gas filter; samples every second |
| Display range | 9 to 999 ppm (1 ppm resolution) |
| Accuracy | ±5% or ±5 ppm, whichever is greater (first year) |
| Memory | Peak level, duration and time; 30-day history; 8-hour TWA |
| Alarm | 85 dB at 10 ft; red alarm LED |
| Power | One 9V alkaline battery |
| Sensor life | 2 years; the manufacturer recommends replacing the monitor annually |
| Operating conditions | 40°F to 100°F, 10% to 90% RH |
| Storage conditions | 30°F to 120°F, 30% to 95% RH |
| Dimensions | 5-9/16" H x 3-7/16" W x 1-5/16" D |
| Weight | 8 oz with battery |
| Warranty | One-year limited manufacturer warranty |
| Made in | Canada |
Refer to the Pro-Tech 8505 owner's manual for complete installation and operating instructions.
