M-55 Series Fixed Set Point Flow Switches

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The M-55 low flow, flow switches monitor increasing and decreasing flow. They utilize a single moving part which responds to fluid (liquid or gas) flowing within a system. These switches are suitable for a wide range of applications in industrial, biomedical, and OEM products. The flow monitors operate only when fluid flow is positively established.

Overview
Specifications
Applications
Documentation

Features:

• For corrosive and non-corrosive gases or liquids
• Senses increasing or decreasing flow
• Very accurate custom flow settings
• Hermetically sealed
• All-PTFE switch available
• Universal mounting available

Housing	Acrylic	Aluminum	316SS	PTFE
Piston*	316SS	316SS	316SS	PTFE
Orifice Plate or Disc	Stainless Steel			PTFE
Spring	Stainless Steel			N/A
Retaining Rings*	Stainless Steel (PH 15-7 MO, AMS 5520, AISI-632) (Passivated)			PTFE
Pressure & Temperature
Maximum Operating (psig)	200	1,000	3,000	80
Burst (psig)	400	2,000	5,000	160
Maximum Operating Temperature	77°C (170ºF)	149°C (300ºF)	149°C (300ºF)	104°C (220ºF)
Reed Switch Data
(Electrical Ratings)	10 Watts SPST or 3 Watts SPDT (Hermetically Sealed) UL Recognized. File E47258.
Reed Switch	Operating Temperature -40ºC to 125ºC
Switching Voltage	200 VDC (170 VDC for SPDT)
Breakdown Voltage	250 VDC (200 VDC for SPDT)
DC Resistive	10 Watts (3 Watts for SPDT)
AC Resistive	10 VA (3VA for SPDT)
Switching Current	0.5 A (0.25 A for SPDT)
Carrying Current	1.2 A (0.5A for SPDT)
Lead Wires	No 24 to 18 AWG. 18" Length, Polymeric UL Recognized (Belden cable or special shielded cable is available)
Lead Wires Color	SPST: 2 Blue wires; SPDT: Green - Common, Yellow - Normally Closed, Orange - Normally Open
Flow Calibration	(Higher accuracy units available)
Set Point Accuracy	10% maximum
Set Point Differential (Deadband)	15%
Repeatability	± 2% maximum

For additional specification details, please refer to the product data sheet located in the documentation tab of this web page.

• Pure water control for sample stations
• Laser equipment
• Pollution sampling equipment