Knobs / Switches / Meter Flow Controllers
Last Updated: April 1, 2025
Description
Knobs, switches, and meter flow controllers are essential components in various industrial and electronic systems. Control knobs are used for the precise adjustment of electronic or electrical devices, providing machines or instruments with controlled levels of circular motion. Switches, such as rotary switches, are used to open or close electrical circuits, often featuring mechanisms like detents to hold them in position. Meter flow controllers are devices that manage the flow rate of fluids or gases within a system, often incorporating sensor inputs and control outputs to maintain desired flow conditions.
Working Principle
Control knobs function by allowing the user to adjust the position of a device or instrument, often featuring indicators or pointers for precise control. Rotary switches operate by rotating a shaft to open or close circuits, with features like actuator detents to maintain position. Meter flow controllers work by receiving sensor inputs, processing these inputs to determine the necessary adjustments, and then outputting control signals to maintain the desired flow rate. These controllers can be programmable and may include features like totalizers to log flow data.
Applications
Control knobs are commonly used in electronic devices for volume control or tuning. Rotary switches are found in applications requiring multiple circuit paths, such as in audio equipment or industrial machinery. Meter flow controllers are used in various industries, including water treatment plants, where they regulate the flow of water through the system, and in chemical processing, where precise control of fluid flow is critical for maintaining product quality.
Advantages over other Process - Fluid and Gas Processing Equipment
Meter flow controllers offer precise control over fluid and gas flow rates, which can be more accurate than manual valve adjustments. They can be integrated with digital systems for automated control, providing real-time data logging and analysis capabilities. This level of control and integration can lead to improved process efficiency and reduced waste.
Limitations
One limitation of meter flow controllers is that they may not be suitable for all types of fluids, particularly those that are highly viscous or contain particulates, which can affect sensor accuracy and device performance. Additionally, the complexity of these devices can lead to higher initial costs and require specialized knowledge for installation and maintenance.
Considerations
When selecting knobs, switches, or meter flow controllers, it is important to consider factors such as initial costs, operating expenses, and the specific requirements of the application. Durability and accuracy are critical for ensuring long-term performance, while replacement and maintenance costs should be factored into the overall cost of ownership. For meter flow controllers, compatibility with existing systems and the ability to handle the specific fluid or gas characteristics are also important considerations.
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Bijur Delimon International
Application. The SS2200 Remote Controller is a microprocessor-based programmable controller specifically designed to control single line and dual line centralized lubricating systems. The remote controller will operate on time or machine cycles and will control electric or motor-driven lubricators. [See More]
- Interface: Switches
- Control: Limit
- Controller Type: Lubrication
- Form Factor: Chassis
from F.B. Leopold, a Xylem brand
The Leopold ® FilterWorx ® Automatic Control System is a complete filter control package consisting of all instrumentation and control equipment for the automatic monitoring and control of municipal water filtration systems. FilterWorx ACS delivers the efficiencies and economies so necessary... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable
- Features: Rate Indication/ Control
- Controller Type: Filter Control
- Form Factor: Stand-Alone
from AW Company
Nine programmable batch amounts, batch and counter totalizer [See More]
- Interface: Switches
- Features: Totalizing (Length or Roll Diameter) Indication/ Control
- Control: Limit
- Form Factor: Chassis
from DME Company
Hydraulic (oil) valve gate controls provide reliable, accurate and effective control. Solid-state timers and relays have a life rating of 10 million cycles. User-friendly auto-reset function. Individual test buttons for each zone provide precise time control to .01 second. Compact design takes up... [See More]
- Interface: Switches; Digital Front Panel (optional feature)
- Features: Rate Indication/ Control
- Control: Limit
- Form Factor: Stand-Alone
from Aalborg Instruments
Design Features. digital and analog modes operate. programmable flow configurations. available flow ranges starting from 0 to 10 sccm up to 0 to 100 slpm. maximum pressure of 1000 psig (70 bars). multi-drop capability of up to 256 units. stores calibration data for up to 10 gases. totalizer... [See More]
- Interface: Switches; Computer Programmable
- Features: Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
- Control: Linear; PID
- Form Factor: Stand-Alone
from OMEGA Engineering, Inc.
APPLICATION The LVCN-141 flow switch controller is commonly used as a low flow shut off for pumps or process protection with a single switch input. The LVCN-131 flow switch controller is commonly used as a dual low flow shut off for pumps or process protection with two independent switch inputs. [See More]
- Interface: Switches
- Form Factor: Stand-Alone
- Control: Limit
- Inputs: 2
from Cleaver-Brooks
The ADAC can control multiple input valves, condensate return, freshwater makeup, emergency makeup, and more. Data is made available to communicate with most BAS systems with an optional CB-PT protocol translator and/or the CB master panel. Setup and control of the deaerator or surge are easy with... [See More]
- Interface: Switches; Digital Front Panel
- Form Factor: Stand-Alone
- Features: PLC; Datalogger
- Media: Liquid; Steam
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from F.B. Leopold, a Xylem brand
The Leopold ® Valve PAC ® Electronic Valve Positioner/Controller is a single-loop controller specifically designed to provide automatic rate-of-flow control of various flows in a water treatment plant, but can be used on a wide range of process control applications. It can be panel-mounted... [See More]
- Interface: Switches; Digital Front Panel
- Features: Rate Indication/ Control
- Controller Type: Filter Control
- Form Factor: Chassis; Stand-Alone
from Aalborg Instruments
Design Features. rigid metallic construction. available flow ranges starting from 0 to 10 sccm up to 0 to 1000 slpm. maximum pressure of 1000 psig (70 bars). leak integrity 1 x 10-7 of helium. NIST traceable certification. built-in tiltable LCD readout (some models). local or remote setpoint... [See More]
- Interface: Switches; Computer Programmable
- Features: Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
- Control: Linear
- Form Factor: Stand-Alone
from OMEGA Engineering, Inc.
The FMA-A2100/2200/2300/2400 Series Electronic Mass Flowmeters/ Controllers provide high performance, versatility and state-of-the-art design in one compact package. The FMA-A2100/ 2200/2300/2400 uses capillary-type thermal technology to directly measure mass flow of gases. No temperature, pressure,... [See More]
- Interface: Switches
- Features: Rate Indication/ Control
- Control: Limit
- Form Factor: Stand-Alone
from Cleaver-Brooks
The Cleaver-Brooks Accu-Draft is a stand-alone, stack draft control system designed to maintain stack draft on set point throughout the firing range of the boiler. This is achieved by modulating the draft damper in response to the deviation between the measured draft and an operator adjusted set... [See More]
- Interface: Switches; Digital Front Panel
- Features: Datalogger
- Control: Limit
- Form Factor: Stand-Alone
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from F.B. Leopold, a Xylem brand
The Leopold ® AFC 5000 ® Filter Control System is designed to automatically control and monitor water and wastewater filter operation and backwash sequence. It is a totally integrated system that consists of the control console, programmable controller hardware, and software. The AFC 5000... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable
- Features: Rate Indication/ Control
- Controller Type: Filter Control
- Form Factor: Stand-Alone
from Aalborg Instruments
In AFC mass flow controllers the combined gas streams. flow through a proportionating electromagnetic valve. with an appropriately selected orifice. The closed loop. control circuit continuously monitors the mass flow out-. put and maintains it at the set flow rate. [See More]
- Interface: Switches; Computer Programmable
- Features: Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
- Control: Linear
- Form Factor: Stand-Alone
from OMEGA Engineering, Inc.
The LVCN-140 single sensor controller provides a high or low sensor alarm function with a single sensor input. With a range of dampening adjustments, this controller can compensate for relay chatter. It conveniently mounts to a standard EN50 022 DIN rail and utilizes a 10 amp relay. All functions... [See More]
- Interface: Switches
- Form Factor: Rack
- Control: Limit
- Type: DC Voltage Inputs
from Vogtlin Massflow USA
The new electronic red-y smart pressure controllers combine the reliable technology our of thermal mass flow controllers with electronic pressure control.The devices automatically control a predefined process pressure and at the same time measure and/or limit the flow rate.On-the-fly switching... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable; Network
- Control: PID; Nonlinear; Other; Select Pressure or Flow
- Controller Type: Pressure + Flow Controller
- Features: Datalogger; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from F.B. Leopold, a Xylem brand
The Leopold ® SFC 2000 ® Supervisory Filter Control System is designed to continuously monitor and automatically control filter operation and backwash sequencing in water and wastewater treatment plants. The SFC 2000 brings PC-based control, operator interface, and data acquisition to the... [See More]
- Interface: Switches; Digital Front Panel; Computer Programmable
- Features: Rate Indication/ Control; PC-Based
- Controller Type: Filter Control
- Form Factor: Stand-Alone
from OMEGA Engineering, Inc.
.The FMA2700/FMA2800 Series Electronic Mass Flow meters and FMA3700/FMA3800 Mass Flow Controllers provide high flow measurement performance and versatility. Omega ’s new inline series features a “flow-through ” zero dead space design for quicker processing and lower contamination. [See More]
- Interface: Switches
- Features: Rate Indication/ Control
- Control: Limit
- Form Factor: Stand-Alone