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.

Enquire Now
Sealevel Products

Showing 180 of 428 Sealevel Products items

Filter your results
Clear Filters
  • Availability
  • Category
  • Bus
  • Protocol
  • Video Outputs
  • Transmission type
  • USB
      • to
  • Ethernet
  • Serial Interface
  • Processor
  • Serial
      • to
  • Mounting Options
  • I/O Type
470N
Sealevel 470N
16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output SeaI/O Expansion Module
£465.50
463M
Sealevel 463M
RS-485 Modbus RTU to 96 Channel TTL Digital I/O Adapter
£264.50
462E-OEM
Sealevel 462E-OEM
Ethernet Modbus TCP to 96 Channel TTL DB78F Digital I/O OEM Board
£383.50
463N
Sealevel 463N
96 Channel TTL Digital Interface SeaI/O Expansion Module
£281.00
462S-OEM
Sealevel 462S-OEM
RS-232 Modbus RTU to 96 Channel TTL DB78F Digital I/O OEM Board
£340.50
470S-OEM
Sealevel 470S-OEM
RS-232 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output OEM Board
£452.00
520E-OEM
Sealevel 520E-OEM
Ethernet Modbus TCP to 8 Isolated Digital Input/8 High Current Form C Relay Output OEM Board
£340.50
530M
Sealevel 530M
RS-485 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter
£428.50
110E-OEM
Sealevel 110E-OEM
Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Reed Relay Output Board
£193.00
463S
Sealevel 463S
RS-232 Modbus RTU to 96 Channel TTL Digital I/O Adapter
£283.00
520N
1 in stock
Sealevel 520N
8 Optically Isolated Input/8 High-Current Form C Relay Output SeaI/O Expansion Module
£280.00
463E
Sealevel 463E
Ethernet Modbus TCP to 96 Channel TTL Digital I/O Adapter
£358.00
520S
Sealevel 520S
RS-232 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter
£280.00
520M
Sealevel 520M
RS-485 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter
£280.00
530S
Sealevel 530S
RS-232 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter
£428.50
570N
Sealevel 570N
8 Analog Input – 8 Isolated Digital Input/8 Form C Relay Output SeaI/O Expansion Module
£403.00
540M-OEM
Sealevel 540M-OEM
RS-485 Modbus RTU to 32 Open-Collector Output OEM Board
£366.00
120E
Sealevel 120E
Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Adapter
£216.00
120E-OEM
Sealevel 120E-OEM
Ethernet Modbus TCP to 4 Optically Isolated Digital Input/4 Form C Relay Output Board
£204.50
150E
Sealevel 150E
Ethernet Modbus TCP to 4 Form C Relay Output Adapter
£193.00
570S
Sealevel 570S
RS-232 Modbus RTU to 8 x 16-bit Analog Input – 8 Isolated Digital Input/8 Form C Relay Output Adapter
£403.00
580E
Sealevel 580E
Ethernet Modbus TCP to 32 Isolated Dry-Contact Inputs
£637.50
540S-OEM
Sealevel 540S-OEM
RS-232 Modbus RTU to 32 Open-Collector Output OEM Board
£366.00
681U
Sealevel 681U
8 Port RS-232 (RJ45) Serial to USB Adapter
£513.00
2801
Sealevel 2801
8 Port RS-232 (DB9) Serial to USB Adapter
£357.50
2106
Sealevel 2106
1 Port RS-422 (DB9) Serial to USB Adapter
£72.50
160E
Sealevel 160E
Ethernet Modbus TCP to 32 Channel TTL Digital I/O Adapter
£215.00
DR104
Sealevel DR104
DIN Rail Mounting Clips
£26.00
170E
Sealevel 170E
Ethernet Modbus TCP to 8 A/D – 2 Optically Dry Contact Input – 2 Solid-State Relay Output Adapter
£303.50
410S
Sealevel 410S
RS-232 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter
£254.50
2128
Sealevel 2128
1 Port RS-232/422/485 (DB9) Software Configurable Serial to USB Adapter Board – PC Bracket
£168.00
410N
Sealevel 410N
16 Optically Isolated Digital Input/16 Reed Relay Output SeaI/O Expansion Module
£254.50
2401
Sealevel 2401
4 Port RS-232 (DB9) Serial to USB Adapter
£184.00
2403
Sealevel 2403
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
£387.00
2404
Sealevel 2404
4 Port RS-232 RJ45 Serial to USB Adapter
£321.00
420E
Sealevel 420E
Ethernet Modbus TCP to 16 Isolated Digital Input/8 Form C Relay Output Adapter
£340.50
420W
Sealevel 420W
Wireless 802.11b/g Modbus TCP to 16 Isolated Digital Input/8 Form C Relay Output Adapter
£366.00
410E-OEM
Sealevel 410E-OEM
Ethernet Modbus TCP to 16 Isolated Digital Input/16 Reed Relay Output OEM Board
£316.00
2104
Sealevel 2104
1 Port Isolated RS-232/422/485 (DB25) Serial to USB Adapter
£125.50
2203
Sealevel 2203
2 Port RS-232/422/485 (DB9) Serial to USB Adapter
£230.00
420M-OEM
Sealevel 420M-OEM
RS-485 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output OEM Board
£254.50
2407
Sealevel 2407
4 Port RS-232/485 RJ45 Versacom Serial to USB Adapter
£335.50
410M
Sealevel 410M
RS-485 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter
£254.50
430S
Sealevel 430S
RS-232 Modbus RTU to 32 Isolated Digital Input Adapter
£230.00
440W
Sealevel 440W
Wireless 802.11b/g Modbus TCP to 32 Reed Relay Output Adapter
£403.00
2823
Sealevel 2823
8 Port RS-232/422/485 (DB9) Serial to USB Adapter
£521.00
440S
Sealevel 440S
RS-232 Modbus RTU to 32 Reed Relay Output Adapter
£304.50
420N
Sealevel 420N
16 Optically Isolated Digital Input/8 Form C Relay Output SeaI/O Expansion Module
£266.50
410M-OEM
Sealevel 410M-OEM
RS-485 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output OEM Board
£242.00
430S-OEM
Sealevel 430S-OEM
RS-232 Modbus RTU to 32 Isolated Digital Input OEM Board
£217.50
470E
Sealevel 470E
Ethernet Modbus TCP to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter
£539.00
463W
Sealevel 463W
Wireless 802.11b/g Modbus TCP to 96 Channel TTL Digital I/O Adapter
£329.00
530E-OEM
Sealevel 530E-OEM
Ethernet Modbus TCP to 16 Isolated Digital Input/16 Open-Collector Output OEM Board
£489.00
530N
Sealevel 530N
16 Isolated Digital Input/16 Open-Collector Output SeaI/O Expansion Module
£428.50
TB-SC06-10-ROHS
1 in stock
Sealevel TB-SC06-10-ROHS
Terminal Blocks: 6 Position Screw Terminal (10 Pack)
2101
Sealevel 2101
1 Port RS-232 (DB25) Serial to USB Adapter
2161
Sealevel 2161
16 Port RS-232 (RJ45) Serial to USB Adapter
2423
Sealevel 2423
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
2433
Sealevel 2433
4 Port RS-232/422/485 (DB9) Serial to USB Adapter
2833
Sealevel 2833
8 Port RS-232/422/485 (DB9) Serial to USB Adapter
Load More

Showing 180 of 428

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.