The 3500 complements the 3100/3200 series by having the lower pressure ranges below 7 bar g.
All have a wide choice of integral electrical connectors such as Deutsch, AMP superseal, M12, DIN and process connection threads in metric and imperial. Outputs are either current or voltage, with the addition option of having a combined pressure and temperature output.
The UK manufactured product line includes the 3100/3200 for higher pressures and hazardous area product lines as well.