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Measurement & Control

Established in 1978 to support the ethanol industry, SMAR has expanded its focus to include energy generation, oil and gas, water treatment, food processing, chemical, and other sectors. Our products' reliability and robustness have enabled us to provide solutions for various applications, including nuclear plants and military projects. SMAR offers a broad range of products for industrial automation, covering devices from the control room to field instrumentation. Our products and third-party devices can be integrated using our System-302 (a truly distributed control system).

History of Innovations

SMAR has a long history of innovation in industrial process control and automation. We were the first to introduce a powerful stand-alone multi-loop PID controller that was block-configurable using a rich graphical user interface (GUI) app for PCs. Our library of function blocks was also highly sophisticated.

In addition, we were pioneers in implementing the HART® and FOUNDATION® Fieldbus protocols for field transmitters. Furthermore, we introduced field pressure transmitters that are capable of measuring, totalizing flow, and controlling valves using an internal PID control, all in a single unit. This innovation eliminates the need for an external PID controller in many applications.

Freedom and Safe Cloud

SMAR gives customers freedom of choice by offering a variety of technological alternatives. For instance, with our line of field transmitters, controllers, and positioners, you can select the most convenient communication protocol for your plant. Choose from 4-20 mA, HART®, FOUNDATION® Fieldbus, PROFIBUS®, Modbus, EtherNet/IP™, DeviceNet™, and others. SMAR devices are available with a large variety of measuring ranges, materials, certificates, accessories, painting types, and network connectivity.
Additionally, we offer highly secure cloud storage for your data, and the SMAR System-302 manage all connectivity for seamless integration across your entire plant with a safe backup.

Frequently Asked Questions

NEW Products

How tough are SMAR field transmitters?

Should I eliminate the 250 Ohm resistor in some cases while working with HART transmitters?

Answer: Even if you know that the load added by the devices in the loop totalizes more than 250 Ohm (that is the minimum load needed to communicate HART). It is NOT recommended to eliminate the classic 250 Ohm resistor from the current loop.

Consider this.

Let's say you are going to do maintenance on one device in the loop. When you remove this device from the loop and take it to the workshop. Let assume that you shorted the 2 points where this device was installed, so the loop keeps closed. In this situation, the total load now could get lower than 250 Ohm based on what was left on the loop. If this happens, the HART communication in the line is compromise and may not work anymore.

On the other way, put in mind that too much load in the line may require a higher voltage power supply for the loop.

Does SMAR have standalone PID controllers?

Answer: SMAR carries many devices with built-in PIDs and other control algorithms. These controllers are present in dedicated controllers, transmitters, PLCs, and in or modern DCS (Distributed Control System), the System-302.

However, I believe that your question is in reference to PID controller units for panel installation, with its own display and buttons interface to interact directly with the user.

For this case I should recommend you to look at the CD600Plus.

The CD600Plus is a stand-alone multi-loop controller that can resolve up to 8 PID controls. It is block configured in an easy to use Windows graphical interface.

See more on the CD600Plus

Are smart HART transmitters better than the 4-20 mA analog ones?

Answer: Let me start by saying that a smart HART® transmitter can also provide the 4-20 mA as an old good analog transmitter.

A HART transmitter can directly replace an old analog transmitter that you already have installed and running in the plant.

You can literally remove the old analog transmitter and replace it with a HART one. Yes, it is compatible with your power supply and the twisted pair of wires used before. Just a brief and important point. You will need to add a 250 Ohm resistor in the loop to be able to communicate with the transmitter.

There are many advantages that a HART transmitter can bring to your plant and operations.

When we understand those added features, we can say that they are a better asset to the plant!

Some immediate benefits are:

Configuration can be done remotely using a HART interface to communicate with the transmitter through a computer or using a hand-held.
Now users have a digital access to the signal and other internal parameters
Considering they are microprocessor-based (smart), they can make internal calculations as PID control, Square Root, Totalization, linearization, filtering, …
Better and easier for diagnostic and routine maintenance
Manufacturers add troubleshooting information
Better integration with a DCS (Distributed Control System)

FAQs

FY500 - NEW VALVE POSITIONER

The FY500 is a nozzle-reed system positioner with coil. Works with a setpoint signal from a controller or other device.

Easy one touch calibration wizard and

IT IS READY TO GO!

SR301S - Sanitary Remote Seals

Meet different applications such as very high or very low temperatures, areas of difficult access or with too much vibration.

Available as Flanged, Pancake, Threaded, and Sanitary

LD400 - For SIL2 and SIL3 Applications

The LD400 is SIL 2 and SIL 3 certified by TUV in compliance with the IEC 61508-2010 for use at Safety Instrumented Systems (SIS).

Available for Pressure, Level and Flow

JM400 - JUNCTION BOXES

Smar junction boxes were especially designed to facilitate fieldbus (FOUNDATION™ fieldbus and PROFIBUS PA), HART®, and conventional instrumentation (4-20 mA) connections.

It is IP66/68 rated enclosure combined with appropriate cable glands, protects the wire connections from dust, water, oil, and moisture.