DATA SHEET Variable Area MT3750C Series Metal Tube Variable Area Flowmeters Brooks® MT3750 meter operation is based on the variable area principle. The all metal meter is ideal for a variety of gas and liquid applications. These meters are indispensable where high pressure operating conditions exist. The primary meter is available in 316L stainless steel construction. But corrosion resistant materials of construction are available which makes it a perfect fit for the metering of aggressive applications. A broad range of threaded connection sizes and types provide for flexible installations. The very popular mechanical indicator option does not require power which reduces installation costs and is a cost-effective solution for flow measurement in hazardous areas. Certified transmitters and alarms both flameproof and instrinsically safe are available for hazardous installations anywhere in the world. Features The Brooks® Ar-MiteTM is a reliable, low flow metal tube flowmeter with 316L stainless steel wetted parts. The magnetically coupled indicator provides a highly reliable method of indication. This model is a practical and economical approach to low flow rate indication for high pressure and difficult to handle fluids. Optional accessories include 4-20 mA output, Needle Valve, Flow Controllers and Alarms. Wetted Parts made from Stainless Steel or Monel Compatible for a wide range of fluids (liquids or gases) Ranges up to 100 I/h or 26 GPH High Pressure and Temperature Rating Miniature Size Local Reading, Integral Control Valve Certified Ex-proof, Intrinsically safe Capable of measuring (very) low flows accurately Designed to work safely under difficult conditions Compact even with process flanges Needle Valve, Transmitter or Alarms, versatile product offering ATEX, CSA, IECEx and NEPSI Approved

Product Specifications / Capacities Table 1 MT3750C Specifications Specifications MT3750C Measuring Range Range See Capacities Table 2 Rangeability Rangeability Metering Tube Tube 316L (stainless steel) Monel K-500 316L (stainless steel) Monel K-500 Accuracy Accuracy Repeatability Repeatability Scale Scale Silver increments with black background - Aluminum Material (52 mm long), single or dual Connections Connections 1/4” to 3/4”NPT Female 1/4”, 6 mm tube compression Floats Floats 316L stainless steel Titanium Gr. II O-rings O-rings Viton® fluoroelastomers PTFE Teflon®, Buna-N, Kalrez® 4079 perfluoroelastomers,...

Product Specifications - Pressure / Temperature and Certifications Table 3 MT3750C Pressure Ratings in PSIG (BarG) Meter Type Standard Meter High Pressure Meter Table 5 MT3750C Temperature Ratings for Elastomer Materials Elastomer Minimum Temperature Materials 4079 Kalrez A Viton PTFE Teflon Buna Ethylene Propylene Maximum Temperature Table 6 Product Approvals - MT3750C (Reference Tables 7, 8 & 9 for Certifications with Transmitter, Reed Switch Alarm and Inductive Inductive Switch Alarm Reed Switch Alarm EU Declaration of Conformity CRN IP66/67 & NEMA 4X IP66/67 IP65 Type 4X Explosion safety...

Product Dimensions - Threaded Connections with Indicator Only *Flow controller bracket not shown. Contact Brooks Instrument for drawing of flow controller with bracket. 4

Product Dimensions - Threaded Connections w/Transmitter or Inductive Alarm *Flow controller bracket not shown. Contact Brooks Instrument for drawing of flow controller with bracket. 5

Product Dimensions - Threaded Connections w/Reed Switch Alarm *Flow controller bracket not shown. Contact Brooks Instrument for drawing of flow controller with bracket. 6

Product Specifications - Transmitter Description - Transmitter The transmitter provides accurate magnet angle detection and conversion to a 4 - 20 mA industry standard output signal, based on the position of a float assembly in the flowmeter. This rugged, compact, microprocessordriven device is capable of providing accurate flow information to your external support systems. The patented magnetic sensor with automatic gain control enables an extremely high dynamic capture range without sacrificing accuracy. (Reference Transmitter Wiring Diagram on page 9) Table 7 Product Approvals -- MT3750C with...

Product Specifications - Reed Switch Alarm/Limit Switches Description - Reed Switch Alarm Two reed switches are installed in the alarm housing to provide signaling or switching functions when a preset flow value has been reached. The reed switches provide high, low or dual setpoints and latched output over the full range. The switches are normally adjusted to the desired flow range in the factory. Modifications to the switch settings can be made in the field. Minimum setting distance between two switches is approximately 40% of the scale. (Reference Reed Switch Wiring Diagram on page 9) Data...

Product Specifications - Reed Switch Alarm/Limit Switches Reed Switch Wiring Diagram Transmitter Wiring Diagram

Product Specifications - Limit Switches/Inductive Alarm Switch Limit Switches - Inductive Alarm Switch One or two electronic limit switches type SJ2-N can be installed in the indicator housing to allow initiation of signaling or switching functions on a preset flow value being reached. The SJ2-N limit switch operates as a slot initiator that is inductively actuated by a cam mounted to the pointer. Any flow value can be used for setting the limit value by sliding the switch along the slot in the mounting plate for the initiators. Minimum setting distance between two limit switches is approximately...

Model Code Code Description Code Option Option Description1 Base Model Number 55 mm, Armored Purge Flowmeter 316L Stn. Stl. & CRN Certification 316L Stn. Stl., CRN Certification & Certified Material to EN 2.2 316 Stn. Stl., CRN Certification & Certified Material to EN 3.1 316L Stn. Stl., CRN Certification & Section IX Welding 316L Stn. Stl., CRN Certification & Certified Material to EN 2.2/Section IX Welding 316L Stn. Stl., CRN Certification & Certified Material to EN 3.1/Section IX Welding 316L Stn. Stl. 316L Stn. Stl., Certified Material to EN 2.2 316L Stn. Stl., Certified material to EN 3.1...