New Peerless/ Danfoss website offers marine pressure transmitters, pressure and temperature switches from stock. Peerless Electronics, an authorized stocking distributor for Danfoss announced that these fine Danfoss Marine products can now be found on a new online store. 1. The MBS 5100 Series Block Pressure Transmitter. This is a high accuracy marine approved block designed pressure transmitter MBS 5100 for use in harsh maritime environments where space is a constraint; 0-400 bar range, 4-20mA output.