Sealevel Serial, I/O, and Embedded Computing Solutions

We supply Sealevel Systems' high-reliability serial, digital I/O, and embedded computing products built for long-term operation in harsh and highly regulated environments.

Their range includes PCIe and PCI serial cards, Ethernet-to-serial devices, industrial I/O modules, and fanless embedded computers. Built for use in military, medical, and industrial environments, Sealevel products are known for rock-solid performance, extended lifecycle support, and compliance with strict operational standards.

Explore our Sealevel product range or get in touch for specialist advice.

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Showing 420 of 426 Sealevel Products items

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1 option available

Sealevel 150E Series

Ethernet Modbus TCP to 4 Form C Relay Output Adapter

From £193.00 (exc. VAT)

1 option available

Sealevel 140PoE Series

Ethernet Modbus TCP to 4 Reed Relay Output Adapter

From £181.50 (exc. VAT)

1 option available

Sealevel 140E Series

Ethernet Modbus TCP to 4 Reed Relay Output Adapter

From £181.50 (exc. VAT)

1 option available

Sealevel 130PoE Series

PoE Modbus TCP to 4 Optically Isolated Digital Input Adapter

From £170.00 (exc. VAT)

1 option available

Sealevel 130E Series

Ethernet Modbus TCP to 4 Optically Isolated Digital Input Adapter

From £170.00 (exc. VAT)

1 option available

Sealevel 120PoE Series

PoE Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Adapter

From £263.00 (exc. VAT)

1 option available

Sealevel 120PoE-OEM Series

PoE Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Board

From £244.50 (exc. VAT)

1 option available

Sealevel 120E Series

Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Adapter

From £216.00 (exc. VAT)

1 option available

Sealevel 120E-OEM Series

Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Board

From £204.50 (exc. VAT)

1 option available

Sealevel 110PoE Series

PoE Modbus TCP to 4 Optically Isolated Digital Input/4 Reed Relay Output Adapter

From £204.50 (exc. VAT)

1 option available

Sealevel 110PoE-OEM Series

PoE Modbus TCP to 4 Optically Isolated Digital Input/4 Reed Relay Output Board

From £193.00 (exc. VAT)

1 option available

Sealevel 110E Series

Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Reed Relay Output Adapter

From £204.50 (exc. VAT)

Our Team Is Here to Help

Get in touch with us today.

Speak to a member of our friendly team to discuss your project and find out how we can support you. Our technical sales team are ready to answer your questions.

Call: +44 (0)1782 337 800 | Email: sales@impulse-embedded.co.uk

1 option available

Sealevel CF104 Series

PC/104 to CompactFlash Adapter

1 option available

Sealevel CA215-ROHS Series

500cm USB Type-A to USB Type-B Cable

1 option available

Sealevel 540S Series

RS-232 Modbus RTU to 32 Open-Collector Output Adapter

From £378.00 (exc. VAT)

1 option available

Sealevel 540M Series

RS-485 Modbus RTU to 32 Open-Collector Output Adapter

From £378.00 (exc. VAT)

1 option available

Sealevel 530S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter

From £428.50 (exc. VAT)

1 option available

Sealevel 520S Series

RS-232 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 530M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter

From £428.50 (exc. VAT)

1 option available

Sealevel 520M Series

RS-485 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 463M Series

RS-485 Modbus RTU to 96 Channel TTL Digital I/O Adapter

From £264.50 (exc. VAT)

1 option available

Sealevel 463S Series

RS-232 Modbus RTU to 96 Channel TTL Digital I/O Adapter

From £283.00 (exc. VAT)

2 options available

Sealevel 462M Series

RS-485 Modbus RTU to 96 Channel TTL DB78F Digital I/O Adapter

From £324.00 (exc. VAT)

1 option available

Sealevel 450S Series

RS-232 Modbus RTU to 16 Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 450M Series

RS-485 Modbus RTU to 16 Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 420M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter

From £266.50 (exc. VAT)

1 option available

Sealevel 420S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter

From £266.50 (exc. VAT)

1 option available

Sealevel 410S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter

From £254.50 (exc. VAT)

1 option available

Sealevel 410M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter

From £254.50 (exc. VAT)

1 option available

Sealevel 440S Series

RS-232 Modbus RTU to 32 Reed Relay Output Adapter

From £304.50 (exc. VAT)

1 option available

Sealevel 440M Series

RS-485 Modbus RTU to 32 Reed Relay Output Adapter

From £304.50 (exc. VAT)

1 option available

Sealevel 430S Series

RS-232 Modbus RTU to 32 Isolated Digital Input Adapter

From £230.00 (exc. VAT)

1 option available

Sealevel 430M Series

RS-232 Modbus RTU to 32 Isolated Digital Input Adapter

From £230.00 (exc. VAT)

1 option available

Sealevel 470M Series

RS-485 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter

From £465.50 (exc. VAT)

1 option available

Sealevel 470S Series

RS-232 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter

From £465.50 (exc. VAT)

1 option available

Sealevel 570M Series

RS-485 Modbus RTU to 8 Analog Input – 8 Isolated Digital Input/8 Form C Relay Output Adapter

From £403.00 (exc. VAT)

1 option available

Sealevel 570S Series

RS-232 Modbus RTU to 8 x 16-bit Analog Input – 8 Isolated Digital Input/8 Form C Relay Output Adapter

From £403.00 (exc. VAT)

1 option available

Sealevel 540S-OEM Series

RS-232 Modbus RTU to 32 Open-Collector Output OEM Board

From £366.00 (exc. VAT)

1 option available

Sealevel 540M-OEM Series

RS-485 Modbus RTU to 32 Open-Collector Output OEM Board

From £366.00 (exc. VAT)

1 option available

Sealevel 530S-OEM Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output OEM Board

From £415.00 (exc. VAT)

1 option available

Sealevel 530M-OEM Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output OEM Board

From £415.00 (exc. VAT)

1 option available

Sealevel 520S-OEM Series

RS-232 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 520M-OEM Series

RS-485 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 463S-OEM Series

RS-232 Modbus RTU to 96 Channel TTL Digital I/O OEM Board

From £257.50 (exc. VAT)

1 option available

Sealevel 463M-OEM Series

RS-485 Modbus RTU to 96 Channel TTL Digital I/O OEM Board

From £239.00 (exc. VAT)

1 option available

Sealevel 462S-OEM Series

RS-232 Modbus RTU to 96 Channel TTL DB78F Digital I/O OEM Board

From £340.50 (exc. VAT)

1 option available

Sealevel 462M-OEM Series

RS-485 Modbus RTU to 96 Channel TTL DB78F Digital I/O OEM Board

1 option available

Sealevel 450S-OEM Series

RS-232 Modbus RTU to 16 Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 420S-OEM Series

RS-232 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output OEM Board

From £254.50 (exc. VAT)

1 option available

Sealevel 420M-OEM Series

RS-485 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output OEM Board

From £254.50 (exc. VAT)

1 option available

Sealevel 450M-OEM Series

RS-485 Modbus RTU to 16 Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 410S-OEM Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output OEM Board

From £242.00 (exc. VAT)

1 option available

Sealevel 410M-OEM Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output OEM Board

From £242.00 (exc. VAT)

1 option available

Sealevel 440S-OEM Series

RS-232 Modbus RTU to 32 Reed Relay Output OEM Board

From £291.00 (exc. VAT)

1 option available

Sealevel 440M-OEM Series

RS-485 Modbus RTU to 32 Reed Relay Output OEM Board

From £291.00 (exc. VAT)

1 option available

Sealevel 430S-OEM Series

RS-232 Modbus RTU to 32 Isolated Digital Input OEM Board

From £217.50 (exc. VAT)

1 option available

Sealevel 430M-OEM Series

RS-232 Modbus RTU to 32 Isolated Digital Input OEM Board

1 option available

Sealevel 470M-OEM Series

RS-485 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output OEM Board

From £452.00 (exc. VAT)

1 option available

Sealevel 470S-OEM Series

RS-232 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output OEM Board

From £452.00 (exc. VAT)

2 options available

Sealevel 462W Series

Wireless 802.11b/g Modbus TCP to 96 Channel TTL DB78F Digital I/O Adapter

From £366.00 (exc. VAT)

Showing 420 of 426

What Is Sealevel’s Specialty?
Sealevel focus on serial and I/O expansion solutions, including USB-to-serial adaptors, digital I/O modules and embedded control systems. Their designs are trusted where reliable connectivity is required across industrial and military sectors.

Why Choose Sealevel Hardware?
With extensive experience in serial communications, Sealevel products provide the robust connectivity needed to extend the life of legacy equipment. Many models also meet MIL-STD specifications for defence projects.

Why Source in the UK Through Impulse?
We deliver Sealevel hardware to our UK customers with technical guidance and lifecycle support, ensuring integration is seamless and supply is dependable across long-term projects.