Model 555 (OEM)
(Tri-Color)

Diaphragm Type

Differential Pressure Indicator

Model 555 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 element. Divided into three sections, each 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 555 is suited for filter applications, line loss, valve drop, and many other differential pressure applications where a simple indicator is needed. Model 555 is available with a Full scale accuracy of ±5%

(0-3.5 PSID to 0-43 PSID)

Product Features/Benefits

Simple Diaphragm Design
Corrosion Resistant
Over-Range Protection, High over Low and Low over High
3/8"-24 UNF Mounting Bolts, Spaced 1.75"; Process connection thru the Mounting Bolts (O-ring seal)
1 Year Warranty
For complete model details See Bulletin_555_OEM.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 (20 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
Elastomers: Buna-N and Viton.
For complete specifications see: Bulletin_555_OEM.pdf

Common Applications

Filter Monitoring
Strainer monitoring

Additional Options:

No additional options as standard are available please contact your sales coordinator for special requirements

The Mid-West Advantage

1 year warranty
30 + Years Hazardous Location product manufacturer.
OEM and Private Label Capabilities
Fast on-time Deliveries
Friendly Customer Support
Certified Quality System CSA B51-09 SAI GLOBAL

Model 555 (OEM)Documents

OEM Indicators “Piston Type”

Model No.	Differential Pressure Range	Accuracy	Working Pressure	Electrical Available	Specifications	Installation/ Operation Manual	Electrical IOM	Drawing
Model 126	0-5 PSID to 0-20 PSID	±5%	3,000 PSI	Available CE Marked to LVD & RoHS		N/A	N/A
Model 127	0-25 PSID to 0-100 PSID	±5%	3,000 PSI	Available CE Marked to LVD & RoHS Directives		N/A	N/A

OEM Indicators “Diaphragm Type”

Model No.	Differential Pressure Range	Accuracy	Working Pressure	Electrical Available	Specifications	Installation/ Operation Manual	Electrical IOM	Drawing
Model 146	0-3 PSID (0-50" H2O) to 0-30 PSID	±5%	1,000 PSI	Electrical Enclosures Weather-Resistant, NEMA 4X		N/A	N/A
Model 444	0-5 PSID to 0-30 PSID	±5%	300 PSI	None available	N/A	N/A	N/A
Model 522 (OEM)OEM	0-5 PSID to 0-50 PSID	±5%	1,000 PSI	Available CE Marked to LVD & RoHS Directives, SPST & SPDT Switches	N/A	N/A	N/A	N/A
Model 555 (OEM)Tri-Color	0-3.5 PSID to 0-43 PSID	±5%	300 PSI	Not Available		N/A	N/A

Model 555 (OEM) (Tri-Color)