Dwyer Instruments Air Velocity Monitor, Model 660

This Dwyer Instruments air velocity monitor has an audible alarm

Item #: 164996 Manufacturer: Dwyer Instruments Manufacturer Item #: 660

	List Price:		$261.95

Features & Applications:

This Dwyer Instruments air velocity monitor is a practical, affordable way to continuously monitor for safe airflows through laboratory fume hoods. They are typically installed in the fume hood side fascia and connected to the interior sidewall via 1-1/8" flexible tubing. As the exhaust fan draws air through the device, a sensitive constant temperature thermistor measures flow and lights a green (normal), yellow (high) or red (low) LED. An audible alarm also warns of low flow and requires manual resetting. Mounting holes fit standard single gang electrical box.

Features:

• Mounting holes fit standard single gang electrical box
• Audible alarm and LED lights

Applications:

• Warns user if insufficient fume hood face velocity is encountered.

Specifications:

Service:	Clean air and compatible, non-combustible gases
High Setpoint Range:	0-275 FPM (0-1.397 m/s)
Low Setpoint Range:	0-150 FPM (0-.792 m/s)
Repeatability:	±7% of full span, 0-50 and 150-275 FPM; ±5% of full span, 50-150 FPM
Compensated Temperature Range:	50 to 90°F (10 to 32.2°C)
Operating Temperature Range:	32 to 120°F (0 to 48.9°C)
Power Supply:	24 VAC, 3 watts maximum
Response Time:	6-10 seconds
Warm-Up Time:	3-5 minutes (no flow)
Audible Alarm:	75 dB between 3-10 feet
Weight:	3 oz (85 g)
Mounting Hardware:	(2) #6 x 1" sheet metal screws, (2) 6-32 x 7/8" machine screws