Dwyer Instruments 670 Catalog Page

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®

MODEL 670

FUME HOOD MONITOR

Ensures Proper Fume Hood Performance

AIR QUALITY

The Model 670 Fume Hood Monitor continuously senses air ow through the face
of the fume hood, ensuring safe levels of fresh air are exhausting. The 670 provides
a highly accurate hot wire sensor to detect very low ows common on fume hoods.
The Model 670 comes with everything required to quickly install the unit including a
mounting bracket, 24˝ of tubing for connecting to the inside of the hood wall and a 120
Volt AC power adapter.

FEATURES/BENEFITS

• Flexible surface or ush mounting

• LED safe and alarm status indicators

• Audible alarm

• Sash alarm input

• Night time set-back

APPLICATIONS

• Fume hood ventilation monitoring

MODEL CHART
Model Description
670 Fume hood monitor

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SPECIFICATIONS
Service: Fume hood face velocity air ow.

Alarm Range: 30-400 FPM (0.15-2.0 m/s).
Alarm Indication: Red LED & audible alarm.
Low Air Velocity Alarm Delay: Fixed 5 secs.
Visual LED Display: Red: Alarm; Green: Normal.
Horn Silence: Yes-temporary and permanent.
Accuracy: Face velocity ±10%.
Temperature Limits: Operating temperature: 55 to 86°F (13 to 30°C); Storage

temperature: -40 to 150°F (-40 to 65°C).
Power Requirement: 15 VDC 500 mA; 120 VAC, 60 Hz power transformer

included.

Relay Output Low Air Flow Alarm: 5 A @ 250 VAC.
Relay Input For Night Setback: 2 wire rated for 24 VDC usage.
Sash High Indication: Using a two wire micro switch or 3 wire proximity switch

input, rated for 24 VDC usage.

Mounting: Semi ush, ush or surface mounted when using included bracket.
Weight: 5.0 oz (141 g).

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