Please note that we will be closed for the holiday period starting from 24th December, and will reopen on 2nd January 2026. Our last shipping dates to customers this year will be - UK Mainland: 22/12/2025. Highlands/2-day carriage: 18/12/2025. FedEx Priority: 16/12/2025. FedEx Economy: 15/12/2025.

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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Sealevel Products

Showing 34 of 34 Sealevel Products items

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3541-KT
Sealevel 3541-KT
4 Port RS-232/422/485 PC/104 Serial Card Kit (C4.104-ULTRA Kit)
7161
3 options available
Sealevel 7161 Series
16 Port RS-232 PCI Serial Card
7108
1 in stock
2 options available
Sealevel 7108 Series
1 Port RS-232/422/485 Isolated Low Profile PCI Serial Card
From £636.00 (exc. VAT)
7106e
2 options available
Sealevel 7106e Series
1 Port RS-232/422/485/530 Low Profile PCI Express Asynchronous Serial Card
From £229.00 (exc. VAT)
7106
2 options available
Sealevel 7106 Series
1 Port RS-232/422/485/530 Low Profile PCI Serial Card
From £437.00 (exc. VAT)
7104
4 options available
Sealevel 7104 Series
1 Port RS-232 Low Profile PCI Serial Card
From £445.00 (exc. VAT)
5402e
1 option available
Sealevel 5402e Series
4 Port RS-232/422/485/530/530A/V.35 PCI Express Synchronous Serial Card
From £1,473.00 (exc. VAT)
5402
1 option available
Sealevel 5402 Series
4 Port RS-232/422/485/530/530/V.35 Synchronous Serial PCI Card
From £1,161.50 (exc. VAT)
5104e
2 options available
Sealevel 5104e Series
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Express Synchronous Serial Card
From £584.50 (exc. VAT)
5104
2 options available
Sealevel 5104 Series
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Synchronous Serial Card
5103e
2 options available
Sealevel 5103e Series
1 Port RS-232 Low Profile PCI Express Synchronous Serial Card
From £453.50 (exc. VAT)
5103
2 options available
Sealevel 5103 Series
1 Port RS-232 Low Profile PCI Synchronous Serial Card
5102e
2 options available
Sealevel 5102e Series
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Express Synchronous Serial Card
From £534.00 (exc. VAT)
5102
2 options available
Sealevel 5102 Series
1 Port RS-232/422/485/530/530A/V.35 Low Profile PCI Synchronous Serial Card
7804e
1 option available
Sealevel 7804e Series
8 Port RS-232/422/485 PCI Express Asynchronous Serial Card
7804
1 option available
Sealevel 7804 Series
8 Port RS-232/422/485 PCI Serial Card
7803
4 options available
Sealevel 7803 Series
8 Port RS-232 Low Profile PCI Serial Card
7802ec
2 options available
Sealevel 7802ec Series
8 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
From £415.50 (exc. VAT)
7406e
4 options available
Sealevel 7406e Series
4 Port RS-232 Low Profile PCI Express Asynchronous Serial Card
7406
5 options available
Sealevel 7406 Series
4 Port RS-232 Low Profile PCI Serial Card
From £481.50 (exc. VAT)
7404e
1 option available
Sealevel 7404e Series
4 Port RS-232/422/485 PCI Express Asynchronous Serial Card
7402e
1 option available
Sealevel 7402e Series
4 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
7205ec
2 options available
Sealevel 7205ec Series
2 Port RS-232/422/485 Low Profile PCI Express Asynchronous Serial Card
From £253.00 (exc. VAT)
7205
2 options available
Sealevel 7205 Series
2 Port RS-232/422/485 Low Profile PCI Serial Card
From £674.50 (exc. VAT)
7204e
2 options available
Sealevel 7204e Series
2 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
7204
4 options available
Sealevel 7204 Series
2 Port RS-422/485 PCI Serial Card
7203e
1 option available
Sealevel 7203e Series
2 Port RS-232/422/485 Isolated PCI Express Asynchronous Serial Card
From £205.00 (exc. VAT)
7202
2 options available
Sealevel 7202 Series
2 Port RS-232 PCI Serial Card
7201
2 options available
Sealevel 7201 Series
2 Port RS-232/422/485 PCI Serial Card
7161e
2 options available
Sealevel 7161e Series
16 Port RS-232 PCI Express Asynchronous Serial Card
3588
1 option available
Sealevel 3588 Series
8 Port RS-485 PC/104 Serial Card
3540
1 option available
Sealevel 3540 Series
4 Port RS-232/422/485 PC/104 Serial Card
3514
1 option available
Sealevel 3514 Series
1 Port RS-232/422/485/530/530A/V.35 PC/104+ Synchronous Serial Card
3512
1 option available
Sealevel 3512 Series
1 Port RS-232/422/485/530/530A/V.35 PC/104 Synchronous Serial Card
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.