Specifications
Transmitter O
2
 M300    14
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland  Transmitter O
2
 M300
Printed in Switzerland  52 121 305
4  Installation instruction
4.1  Unpacking and inspection of equipment
Inspect the shipping container. If it is damaged, contact the shipper immediately for instructions. 
Do not discard the box. 
If there is no apparent damage, unpack the container. Be sure all items shown on the packing 
list are present. 
If items are missing, notify Mettler-Toledo immediately
4.1.1  Panel cutout dimensional information – 1/4DIN models
1/4DIN Model transmitters are designed for panel-mount installation only. Each transmitter is 
supplied with mounting hardware to provide fast and simple installation to a flat panel or flat 
enclosure door. To insure a good seal and maintain IP integrity of installation, the panel or door 
must be flat and have a smooth finish. Hardware consists of:
Two – Snap-on Mounting brackets
One – Mounting gasket seal
Transmitter dimensions and mounting are shown in figures below.










