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 180 of 428 Sealevel Products items

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Sealevel 3588
8 Port RS-485 PC/104 Serial Card
Sealevel 3541-KT
4 Port RS-232/422/485 PC/104 Serial Card Kit (C4.104-ULTRA Kit)
Sealevel 3540
4 Port RS-232/422/485 PC/104 Serial Card
Sealevel 3514
1 Port RS-232/422/485/530/530A/V.35 PC/104+ Synchronous Serial Card
Sealevel 3512
1 Port RS-232/422/485/530/530A/V.35 PC/104 Synchronous Serial Card
Sealevel 3098
32 Switched Relay Output ISA Card
Sealevel 3096
8-Channel Isolated Digital Input/8-Channel Reed Relay Output ISA Card
Sealevel 3095
16 Reed Relay Output ISA Card
Sealevel 3094
16 Optically Isolated Digital Input ISA Card – ISO-16
Sealevel 3093
16-Channel Isolated Digital Input/16-Channel Reed Relay Output ISA Card
Sealevel 2833
8 Port RS-232/422/485 (DB9) Serial to USB Adapter
Sealevel 2823
8 Port RS-232/422/485 (DB9) Serial to USB Adapter
£521.00
Sealevel 2807
8 Port RS-232/485 RJ45 Versacom Serial to USB Adapter
£435.50
Sealevel 2804
8 Port RS-232 RJ45 Serial to USB Adapter
£466.00
Sealevel 2803
8 Port RS-232/422/485 (DB9) Serial to USB Adapter
£524.00
Sealevel 2802
8 Port RS-422/485 DB9 Serial to USB Adapter
£503.50
Sealevel 2801
8 Port RS-232 (DB9) Serial to USB Adapter
£357.50
Sealevel 270U
7 Port Isolated Industrial USB 2.0 Hub
Sealevel 2433
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
Sealevel 2423
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
Sealevel 2407
4 Port RS-232/485 RJ45 Versacom Serial to USB Adapter
£335.50
Sealevel 2404
4 Port RS-232 RJ45 Serial to USB Adapter
£321.00
Sealevel 2403
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
£387.00
Sealevel 2402
4 Port RS-422/485 (DB9) Serial to USB Adapter
£196.50
Sealevel 2401
4 Port RS-232 (DB9) Serial to USB Adapter
£184.00
Sealevel 2228
2 Port RS-232/422/485 (DB9) Software Configurable Serial to USB Adapter Board – PC Bracket
£173.00
Sealevel 2223-OEM
2 Port RS-232/422/485 (DB9) OEM Serial to USB Board
£185.00
Sealevel 2223
2 Port RS-232/422/485 DB9 Serial to USB Adapter
£184.00
Sealevel 2213
2 Port Isolated RS-232/422/485 (DB9) Serial to USB Adapter
£297.00
Sealevel 2208
2 Port RS-232 (DB9) Serial to USB Adapter Board – PC Bracket
£140.50
Sealevel 2203
2 Port RS-232/422/485 (DB9) Serial to USB Adapter
£230.00
Sealevel 2202
2 Port RS-422/485 DB9 Serial to USB Adapter
£230.00
Sealevel 8111-OEM
USB to 32 Channel TTL Digital I/O OEM Board
Sealevel 8018
24 Channel TTL Digital I/O Low Profile PCI Card
Sealevel 8012e
8 Isolated Digital Input/8 Reed Relay Output Low Profile PCI Express Card
£245.00
Sealevel 8012
8 Isolated Digital Input/8 Reed Relay Output Low Profile PCI Card
Sealevel 8006He
16 Isolated Digital Input (10V-30V) PCI Express Card
£410.00
Sealevel 8006e
16 Isolated Digital Input (3V-13V) PCI Express Card
£441.50
Sealevel 8005
48-ch TTL Digital I/O PCI Card
£392.00
Sealevel 8004e
16 Isolated Digital Input/16 Reed Relay Output PCI Express Card
£524.50
Sealevel 8003e
16 Reed Relay Output PCI Express Card
£472.00
Sealevel 7804e
8 Port RS-232/422/485 PCI Express Asynchronous Serial Card
Sealevel 7804
8 Port RS-232/422/485 PCI Serial Card
Sealevel 7803
8 Port RS-232 Low Profile PCI Serial Card
Sealevel 7802ec
8 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
£415.50
Sealevel 7406e
4 Port RS-232 Low Profile PCI Express Asynchronous Serial Card
Sealevel 7404e
4 Port RS-232/422/485 PCI Express Asynchronous Serial Card
Sealevel 7402e
4 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
Sealevel 7205ec
2 Port RS-232/422/485 Low Profile PCI Express Asynchronous Serial Card
£253.00
Sealevel 7205
2 Port RS-232/422/485 Low Profile PCI Serial Card
£674.50
Sealevel 7204e
2 Port RS-422/485 Low Profile PCI Express Asynchronous Serial Card
Sealevel 7204
2 Port RS-422/485 PCI Serial Card
Sealevel 7203e
2 Port RS-232/422/485 Isolated PCI Express Asynchronous Serial Card
£205.00
Sealevel 7202
2 Port RS-232 PCI Serial Card
Sealevel 7201
2 Port RS-232/422/485 PCI Serial Card
Sealevel 7161e
16 Port RS-232 PCI Express Asynchronous Serial Card
Sealevel 7161
16 Port RS-232 PCI Serial Card
Sealevel 7108
1 Port RS-232/422/485 Isolated Low Profile PCI Serial Card
£636.00
Sealevel 7106e
1 Port RS-232/422/485/530 Low Profile PCI Express Asynchronous Serial Card
£229.00
Sealevel 7106
1 Port RS-232/422/485/530 Low Profile PCI Serial Card
£437.00
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Showing 180 of 428