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 240 of 426 Sealevel Products items

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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 463N Series

96 Channel TTL Digital Interface SeaI/O Expansion Module

From £281.00 (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 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 463E Series

Ethernet Modbus TCP to 96 Channel TTL Digital I/O Adapter

From £358.00 (exc. VAT)

1 option available

Sealevel 463E-OEM Series

Ethernet Modbus TCP to 96 Channel TTL Digital I/O OEM Board

From £332.00 (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)

1 option available

Sealevel 462U-OEM Series

USB Modbus RTU to 96 Channel TTLDigital I/O OEM Board

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)

2 options available

Sealevel 462S Series

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

From £368.00 (exc. VAT)

3 options available

Sealevel 462N Series

96 Channel TTL DB78 Digital Interface SeaI/O Expansion Module

From £313.50 (exc. VAT)

1 option available

Sealevel 462M-OEM Series

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

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 462E-OEM Series

Ethernet Modbus TCP to 96 Channel TTL DB78F Digital I/O OEM Board

From £383.50 (exc. VAT)

2 options available

Sealevel 462E Series

Ethernet Modbus TCP to 96 Channel TTL DB78F Digital I/O Adapter

From £409.00 (exc. VAT)

1 option available

Sealevel 450W Series

Wireless 802.11b/g Modbus TCP to 16 Form C Relay Output Adapter

From £378.00 (exc. VAT)

1 option available

Sealevel 450U Series

USB Modbus RTU to 16 Form C Relay Output Adapter

1 option available

Sealevel 450U-OEM Series

USB Modbus RTU to 16 Form C Relay Output OEM Board

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 450S-OEM Series

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

From £266.50 (exc. VAT)

2 options available

Sealevel 450N Series

16 Form C Relay Output SeaI/O Expansion Module

From £266.50 (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 450M-OEM Series

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

From £266.50 (exc. VAT)

1 option available

Sealevel 450E Series

Ethernet Modbus TCP to 16 Form C Relay Output Adapter

From £353.50 (exc. VAT)

1 option available

Sealevel 450E-OEM Series

Ethernet Modbus TCP to 16 Form C Relay Output OEM Board

From £340.50 (exc. VAT)

1 option available

Sealevel ISO-1R Series

1 Port SeaISO Ruggedised Inline USB Isolator Cable

1 option available

Sealevel ISO-1 Series

1 Port SeaISO Inline USB Isolator

1 option available

Sealevel ISO-1-OEM Series

1 Port SeaISO Embedded Inline USB Isolator

1 option available

Sealevel HUB7P-UK Series

7 Port Industrial USB 2.0 Hub

1 option available

Sealevel HUB7M-UK Series

7 Port Industrial USB 2.0 Hub

1 option available

Sealevel HUB7i-UK Series

7 Port Isolated Industrial USB 2.0 Hub

1 option available

Sealevel HUB4PH-UK Series

4 Port Industrial USB 2.0 Hub

1 option available

Sealevel HD104 Series

PC/104 to 2.5" Hard Disk Drive Adapter

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

13 options available

Sealevel 9065 Series

ACC-188 USB Synchronous Serial Radio Adapter

7 options available

Sealevel 9064 Series

ACC-188 PCMCIA Synchronous Serial Radio Adapter

1 option available

Sealevel 8232 Series

USB to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter

1 option available

Sealevel 8227 Series

USB to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter

1 option available

Sealevel 8225 Series

USB to 16 Form C Relay Output Adapter

1 option available

Sealevel 8224 Series

USB to 32 Reed Relay Output Adapter

1 option available

Sealevel 8223 Series

USB to 32 Isolated Digital Input Adapter

1 option available

Sealevel 8222 Series

USB to 16 Isolated Digital Input/8 Form C Relay Output Adapter

1 option available

Sealevel 8221 Series

USB to 16 Isolated Digital Input/16 Reed Relay Output Adapter

1 option available

Sealevel 8209FX Series

USB to 8 Isolated Digital Input/8 Reed Relay Output Adapter

1 option available

Sealevel 8208FX Series

USB to 16 Reed Relay Output Adapter

1 option available

Sealevel 8207FX Series

USB to 16 Isolated Digital Input Adapter

1 option available

Sealevel 8206FX Series

USB to 8 Isolated Digital Input/8 Form C Relay Output Adapter

2 options available

Sealevel 8205FX Series

96 Channel TTL Digital I/O USB Adapter – SeaLINK PIO-96

2 options available

Sealevel 8203FX Series

48 Channel TTL Digital I/O USB Adapter – SeaLINK PIO-48

1 option available

Sealevel 8126-OEM Series

USB to 32 Channel TTL Digital I/O OEM Board

1 option available

Sealevel 8126-KT Series

USB to 32 Channel TTL Digital I/O Adapter Kit

1 option available

Sealevel 8115 Series

USB to 4 Form C Relay Output Adapter

1 option available

Sealevel 8115-OEM Series

USB to 4 Form C Relay Output OEM Board

1 option available

Sealevel 8115-KT Series

USB to 4 Form C Relay Output Adapter Kit

1 option available

Sealevel 8114 Series

USB to 4 Reed Relay Output Adapter

1 option available

Sealevel 8114-OEM Series

USB to 4 Reed Relay Output OEM Board

1 option available

Sealevel 8114-KT Series

USB to 4 Reed Relay Output Adapter Kit

1 option available

Sealevel 8113 Series

USB to 4 Isolated Digital Input Adapter

1 option available

Sealevel 8113-OEM Series

USB to 4 Isolated Digital Input OEM Board

Showing 240 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.