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MSR175 Shock Transportation Data Logger
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Merlin Subsea Data Logger

Merlin Subsea Data Logger

Quick Overview

The Merlin subsea data logger is suitable for operation down to depths of 4000 metres, and can monitor up to 10 analogue, a K type Thermocouple and 1 Modbus serial input plus integral 3-axis acceleration and light sensor. The logger has an internal memory capacity of 1,500,000 readings, which can be expanded with an SD memory card to over 100 million readings. The analogue input channels are user configurable to measure, voltage, or frequency. The serial input supports RS485 Modbus protocol which can be used to read pressure and temperature data from up to 8 of our subsea pressure sensors.
View Options


  • Subsea data logger
  • Integral sensors for x, y, z acceleration and light
  • 10 analogue inputs channels (0-5vDC)
  • Supports voltage, mA and frequency inputs
  • Up to 7 analogue inputs can be set for flowmeter frequency inputs
  • 1 serial channel for RS485 Modbus protocol
  • 1 serial channel for CANBUS serial data
  • Serial channel supports up to 8 Keller subsea pressure sensors
  • Pressure measurement to 1360 bar, with accuracy to 0.01% FSD
  • Flow measurement 0-5 to 0-10,000 Ltrs/min accuracy 0.5% FSD
  • Optional subsea high contrast backlit LCD display
  • Internal memory 1.5 million readings
  • Micro SD card holds an additional 100 million readings
  • Depth rated to 4000 metres
  • External power supply 11-30vDC
  • Power consumption 8mA with display on, 5mA with display off
  • Internal battery option provides minimum one month operation without external power
  • Surface programming and data transfer by wireless USB link, or standard wired USB cable.

The Merlin subsea data logger can be configured to measure a wide range of parameters such as pressure, flow, continuity etc. It is compatible with most sensor analogue outputs and also standard serial protocols. It is also compatible with Keller subsea pressure sensors (both analogue and serial outputs) and NT Series subsea turbine flow meters. For more information on compatible pressure and flow sensors click here.

The logger can hold 1.5 million readings in it's internal flash memory and a further 100 million readings on a micro SD card. Two communications options are available:

Standard - RS232 communications for logger programming and data download from the flash memory (1.5 million readings)

Enhanced - wireless USB over Wifi for logger programming, data download, both flash and micro SD card. The RS232 port is also included for programming and data download of the flash memory where Wifi cannot be used.

Availability: In stock

Price range : £8,000.00 - £19,304.40

Price as configured: £8,000.00

Price as configured: £8,000.00


Part Builder

Description       Subsea data logger with 10 analogue, 1 x K type thermocouple and 1 serial RS485 input for up to 8 subsea pressure sensors, integral triple axis accelerometer and light sensor, single LCD display, fitted in a globe with external protective jacket and 2 x 16 pin subcon bulkhead connectors. Depth rated to 4000 metres. Includes, RS232 and charging cables, and external power plug. Includes pressure testing.

Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

Merlin Subsea Data Logger
Merlin Subsea Data Logger
Complete subsea logging system, suitable for depths to 4000 metres. Battery powered logger with SD card memory, max logging rate 1 Hz, with analogue, voltage, frequency and serial inputs. Integral high contrast LCD display. Sensors available for pressure, flow and temperature.
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   Size: (1.33 MB)

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