Description
The Dwyer 1211-36 Slack Tube Manometer is a reliable, field-proven instrument designed for HVAC technicians who need accurate low-pressure differential readings without the bulk of rigid gauges. With a measurement range of 18-0-18″ w.c. and a mercury requirement of 17½ ounces Hg, this manometer delivers precise readings for a variety of air-side applications.
One of its standout features is its flexible, roll-up design — the slack tube construction allows the unit to be coiled and stored compactly, making it an ideal addition to any service technician’s toolkit. Whether you’re on a rooftop unit, in a mechanical room, or navigating a tight equipment closet, the 1211-36 travels easily and deploys quickly.
Key Features
- Measurement range: 18-0-18″ w.c. (water column)
- Mercury required: 17½ ounces Hg
- Flexible slack tube design rolls up for compact, easy storage
- Ideal for filter monitoring — quickly verify filter loading and replacement intervals
- Suited for duct static pressure measurement to assist in setting damper position
- Simple, no-power operation — no batteries or electrical connections required
- Durable construction built for repeated field use
Applications
- Air filter differential pressure monitoring
- Duct static pressure measurement
- Damper position setting and balancing
- General HVAC air-side pressure diagnostics
Why Choose the Dwyer 1211-36?
Dwyer Instruments has been a trusted name in pressure measurement for decades. The 1211-36 Slack Tube Manometer combines simplicity, portability, and accuracy — making it the go-to choice for HVAC professionals who need dependable low-pressure readings in the field. No power source, no complex setup — just connect, read, and go.
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