The PROTRAN© PR3930/PR3940 subsea pressure transmitters with RS-485 Interface or Modbus RTU have been designed to meet the demanding requirements of pressure measurement at deep levels of immersion, especially in oil industry applications and for ROV use.

They can be configured to suit a multitude of applications and with proprietary RS-485 interface or Modbus RTU, each sensor can be allocated a unique device address and connected in series to other sensors and devices on the same communications link. It is also compatible with ESI-USB software.

Housed in a fully welded body, this product will provide a durable solution for long-term accurate pressure measurement even when permanently situated in extreme depth sub-sea environments. All versions utilise ESI’s outstanding Silicon-on-Sapphire sensor featuring all titanium wetted parts for excellent media compatibility and long-term reliable performance. Providing a half-duplex digital RS-485 output signal and 0-5 V analogue output, or Modbus RTU output signal and 0-5V analogue output, the PR3930/PR3940 provides high stability and repeatability for pressure ranges up to 1,500 bar. Digital accuracy is 0.15%, with an exceptional overpressure limit.

Intended for permanent immersion the products can withstand external pressures of up to 6,000 metres depth. Units can be supplied with hyperbaric test certificates to 3,000 metres water submersion. The standard electrical connection is via an 8 pin Subconn MCBH8M connector (6 pin option available). Other subsea connections are available.

Datasheet

Standard pressure ranges:

0 -100 bar; 0 – 250 bar; 0-400 bar; 0-600 bar; 0-1,000 bar; 0 – 1,500 bar (other ranges available)

Typical applications include:

• ROV and deep sea test equipment
• Permanent immersion at extreme depths
• Subsea environments

Electrical Connections