Lab Unlimited UK

The Carl Stuart Group was founded in 1984 by Stuart and Gillian Smith. From a small beginning our business has grown to encompass many services and products, covering different market sectors and geographical regions. The focus of our business, however, remains the same. We are a customer orientated company and strive to meet and exceed your expectations in everything we do.

As our portfolio grew we decided to present and promote our product and technical service offerings under distinct brands.  The Laboratory instrumentation, consumables and technical & integration services are promoted under Lab Unlimited.

The Lab Unlimited product portfolio offers laboratory/analytical products from more than four hundred leading manufacturers. A substantial part of this offering is published on this very site. We also produce a printed catalogue that can be requested by emailing us.

How Do You Communicate with Your Alicat Device?

How Do You Communicate with Your Alicat Device?

Alicat flow meters or pressure controllers output a large amount of data that can be useful in multiple ways. The most elementary way of communication would be through the LCD panel on the front of the device. Here you can choose to display different scientific parameters like: unit ID, absolute pressure, temperature, volumetric flow, mass flow, set point and gas type. 

However more advanced communication features are also available like internet protocols, ethernet-based protocols, RS232, RS45, Modbus RTU, Modbus TCP/IP, DeviceNet, Profibus, EtherCAT, and analog signals like 4-20mA, 0-10 volt, or 0-5 volt.

Depending on your application it is important to choose the ideal form of communication and interaction with the instrument. According to Alicat, before deciding on which protocol to use, the customer needs to be mindful of the existing set up. “For example, a small laboratory starting from scratch interested in getting the experiment up and running quickly would be best served using RS232 connected to a computer. Even more simply, they could use the six buttons on the front panel, right out of the box. However, if a large factory is integrating an Alicat into a system with potentially hundreds of other existing devices on a common network, we can usually accommodate the protocol that allows the device to integrate into the factory’s system.”

Supported Protocols:

RS232 is the most feature-rich way to digitally communicate with 
your Alicat devices, (through a standard DB9 cable);

RS485 if you need to run a line for thousands of feet.

Internet protocols, ethernet-based protocols, Modbus RTU, Modbus TCP/IP, DeviceNet, Profibus, EtherCAT (to communicate with other equipment and/or networks);

Analog signals like 4-20mA, 0-10 volt or 0-5 volt (to accommodate legacy systems);

Alicat has engineered a multi-drop version of their communication language that allows up to 26 devices to talk on the same RS232 network in parallel. “By assigning each with a letter of the alphabet, the named instruments will only respond when they are addressed by their corresponding letter.” 

Would you like to know more?

You can read the full article from Alicat or check out the range of flow meters we have available on our website:

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