Dwyer Magnehelic 2000 Series Low Differential Pressure Gauge

Prices starting at:
Price $75.35
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4" dial differential pressure gauges for air or non-corrosive gases, ±2% to ±4% full scale accuracy (depending on range), 1/8" NPTF paired process connections (side and back), diecast aluminum case and bezel with polycarbonate lens, aluminum dial.  Ranges 0.05" to 250" water column standard.

Dwyer Magnehelic 4" dial differential pressure gauges are ideal for both portable and stationary applications, measuring fan, blower, and fluid system pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, and liquid levels with bubblers.

Using simple, frictionless Magnehelic movement, the gauge quickly indicates low air or non-corrosive gas pressures: positive, negative, or differential. The design resists shock, vibration, and overpressure, and has no manometer fluid to evaporate, freeze, or cause toxic or leveling problems. Make adjustments without removing the cover with the conventient zero adjustment screw.

  • For low air or gas positive, negative, or differential pressure
  • Rated pressures: -20" Hg to 15 PSIG total on either side of diaphragm
  • Accuracy: ±2% to ±4% full scale, depending on model; high accuracy option (-HA) to ±1% full scale available
  • 1/8" NPT high and low pressure taps (one pair on side, one on back)
  • Available in inches water column, PSI, centimeters or millimeters water column, Pascals and kiloPascals

Model Selection Guide

Use this table to find the right model for your application. If the range or engineering unit you need isn't listed here, call Lesman at 800-953-7626. 

Magnehelic gauges are also available in high accuracy and low temperature models. Call for pricing and availability.

Range ("WC)AccuracyClick for Price
and Availability
  Range ("WC) AccuracyClick for Price
and Availability
  Range Accuracy Click for Price
and Availability
0.05-0-0.2±4% FS2000-00N [1]0-50±2% FS 20500-1 PSI±2% FS2201
0-0.25±4% FS2000-00 [1]0-60±2% FS 20600-2 PSI±2% FS2202
0-0.50±3% FS2000-0 [1]0-80±2% FS 20800-3 PSI±2% FS2203
0-1.0±2% FS20010-100±2% FS 21000-4 PSI±2% FS2204
0-2.0±2% FS20020-120±2% FS2120 0-5 PSI±2% FS2205
0-3.0±2% FS20030-150±2% FS 21500-10 PSI±3% FS 2210
0-4.0±2% FS20040-160±2% FS2160 0-15 PSI±3% FS2215
0-5.0±2% FS20050-180±2% FS2180 0-20 PSI±3% FS2220
0-6.0±2% FS20060-250±2% FS2250 0-30 PSI±4% FS2230
0-8.0±2% FS20080.125-0-0.125±4% FS 2300-00 [1] Accessories
0-10±2% FS20100.25-0-0.25±3% FS 2300-0 [1] Portable Carrying Kit A-432
0-12±2% FS20120.5-0-0.5±2% FS 2301 Flush-Mount Kit A-464
0-15±2% FS20151-0-1±2% FS 2302    
0-20±2% FS20202-0-2±2% FS 2304    
0-25±2% FS20255-0-5±2% FS 2310    
0-30±2% FS203010-0-10±2% FS2320   
0-40±2% FS204015-0-15±2% FS 2330    


  • [1] Calibrated for vertical scale position

More Information
Dial Size 4 Inch
Process Connection 1/8" NPTF Back, 1/8" NPTF Side
Case Material Aluminum
Liquid Filled No
Accuracy 2% to 4% full scale, depending on range
Dial Material Aluminum
Measuring Range 0.05" to 250" WC
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