Model 555A
(3-Color Dial)

Diaphragm Type

Differential Pressure Gauge & Switch

Model 555A Diaphragm Type Differential Pressure TRI-COLOR Indicator is designed for determining the state of an in-line filter. Colored bands allow you to quickly identify pressure drop across the filter element. Divided into three sections, each is clearly marked for ease of understanding. Filtration systems require monitoring to maintain a level of performance specified by the manufacturer for the continued expectations of the end user. Commonly used to indicate when to change or clean a filter Model 555A is suited for filter applications, line loss, valve drop, and many other differential pressure applications where a simple indicator is needed. The Model 555A has no available switch options (see Model 522).  Model 555A is available with a Full scale accuracy of ±5% (0-3.5 PSID to 0-43 PSID)

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Product Features/Benefits

  • Simple Diaphragm Design
  • Corrosion Resistant
  • 10-32 UNF Threaded Mounting Holes in Aluminum Base ¾” Apart
  • 1 Year Warranty
  • For complete model details See bulletin_555a.pdf

Specifications / Configuration

  • 2 Sided Dial Indication
  • Dial Scale Ranges: 0-3.5 PSID to 0-43 PSID
  • Differential Full Scale Ascending Accuracy ±5% (ASME B40.1 Grade D)
  • Working Pressures up to 300 PSIG (200 Bar)
  • Operating Temp -40°F to +150°F (-40°C to +65.6°C)
  • Material of Construction of Body – Glass Filled Nylon (GFN) (Wetted Part)
  • Internal Wetted Parts-Stainless Steel, Ceramic Magnet, and GFN
  • ¼” FNPT End Connections Only
  • Elastomers: Buna-N and Viton
  • For complete specifications see: bulletin_555a.pdf

Common Applications

  • Filter and Strainer Monitoring

Additional Options:

  • No additional options as standard are available. Please contact your sales coordinator for special requirements.

The Mid-West Advantage

Model 555ADocuments

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“Diaphragm Type” Gauges with Electrical Optional

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 114 0-0.72 PSID (0-20" H20) to 0-20 PSID (0-600" H2O)
Tank Level Applications		 ±3/2/3% 1000 PSI CE / LVD, RoHS Compliant, NEMA 4X, 4-20mA Transmitter
Model 130 0-5" H2O to 0-15 PSID (0-400" H2O) 0-5" H2O to 0-9.9" H2O
±5%
0-10" H2O to 0-15 PSID
±3/2/3%		 Up to 500 PSI CE / LVD, RoHS Compliant, NEMA 4X, Class 1-Div. 1
Model 140 0-50" H2O to 0-100 PSID 0-50" H2O to 0-399" H2O
±5%
0-15 PSID to 0-100 PSID
±3/2/3%		 Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter
Model 142 0-20" H2O to 0-25 PSID ±3/2/3% Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 2, 4-20mA Transmitter
Model 522 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/A

Electrical “Diaphragm Type” Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 240 0-20" H2O to 0-100 PSID ±3/2/3% Up to 1500 PSI CE / ATEX / RoHS Compliant CSA, UL & KOSHA CERTIFIED, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter N/A
Model 700 / 710 / 715 0-5 PSID to 0-300 PSID ±0.50% 2,900 PSI 2-Wire
4-20 mA Transmitter 15-28 VDC, LCD = 4-20 mA Transmitter 18-28 VDC, LED = 4-20 mA Transmitter 20-28 VDC
3 Wire
15-28 VDC/1-5 VDC, 15-28 VDC/0-5 VDC, 15-28 VDC/0-10 mADC, 15-28 VDC/0-20 mADC, 15-28 VDC/0-10 VDC 		N/A

“Indicator”  Style Diaphragm Type Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 522C3-Color Dial 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/AN/A
Model 555A3-Color Dial 0-3.5 PSID to 0-43 PSID ±5% 300 PSI Not Available N/AN/AN/A