McMillan OSMIUM Series Thermal Flow Switches
McMillan OSMIUM Series Thermal Flow Switches
McMillan Flow Products introduces the OSMIUM Series, a highly robust thermal flow switch with precision
engineered flow body to create a reliable, cost-effective flow monitoring solution that requires minimal set-up
and is easy to install.
Designed to achieve optimal flow conditions in a compact package, the OSMIUM thermal flow switch has options available to cover a wide range of flow rates and can be paired with an assortment of different process connections, providing flexibility for a variety of applications.
The OSMIUM’s technology features microprocessor-based temperature compensation, ensuring reliable flow monitoring even in the presence of temperature fluctuation.
McMillan Flow Products offers a unique calibration service for this product to ensure exceptional performance and repeatability for each customer’s specific application.
The OSMIUM thermal flow switch provides a simple and efficient solution for customers in need of reliable and cost-effective flow monitoring for their non-viscous water-based liquids.
- FLOW BODY DESIGN AND FLOW RANGES
Flow bodies are designed to achieve optimal flow conditions in a compact package and are available in aluminum or stainless steel construction. Flow ranges as low as 150 – 1000 mL/min to as high as 1.2 – 50.0 L/min are supported.
- FLUID CONNECTIONS
Process connections are available in a wide variety of sizes and material construction. Range 1L | 10L | 20L units come stock with 3/8” FNPT ports, and Range 50L units come stock with 3/4” FNPT ports. Consult the Fitting Availability Chart located in the Ordering Information section on page 5 for more details.
- MICROPROCESSOR-BASED TEMPERATURE COMPENSATION
The system achieves superior temperature compensation during the measuring cycle using a microcontroller. This ensures accurate correction of flow measurement even when liquid temperature changes occur.
- SWITCH OUTPUT FUNCTION
This device utilizes a PNP open collector that is either normally open or normally closed. The normally open option enables a high-resistance state when the flow is below the setpoint. The normally closed enables a high-resistance state when the flow is above a setpoint.
- ELECTRICAL CONNECTION
Units come standard with a 4-Pin Micro DC connection. Optional mating cables with various lengths are available.
| Model No. | 8721 | 8723 |
| Medium | Water-Based Liquids Water Content ≥ 90% Not Suitable for Oils or Fuels |
|
| Liquid Temperature | -20 to 80 °C [ -4 to 176 °F ] | |
| Max Pressure | Dependent on fittings Plastic Fittings = 200 psi [ 13 bar ] Steel Fittings = 500 psi [ 34 bar ] |
|
| Switching Range | Velocity Dependent 0.15 to 6.6 ft/sec |
|
| Repeatability | ± 2% Full Scale | |
| Response Time | 5.6-sec Signal Cycle | |
| Flow Indication | Trend Indication 8-position LED Array Display |
|
| Power Supply | 24 VDC ± 10% at 150 mA max | |
| Wetted Materials | Aluminum 316L Stainless Steel |
316L Stainless Steel |
FOR LIQUID APPLICATIONS
- Cooling systems monitoring
- Precision chemical dosing
- Semiconductor processing control
- Pharmaceutical manufacturing control
- Brewing and distilling
