Depth/Level Pressure Transmitter with Internal Lightning Protection The PTX 1835 and 1235 submersible depth/level pressure transmitters are specifically designed for depth/level measurements in groundwater, well water, canals, rivers and other similar applications where the possibility exists for lightning damage. These devices have the same high performance and excellent reliability as the PTX 1830 and 1230 with the additional benefit of internal lightning protection.   Product Description Internal lightning protection to IEC 61000-4-5, Level 4 is incorporated inside the device as a means of protecting against a possible water lightning strike. It is also recommended that a high-performance external lightning arrestor be used to provide extra protection to surrounding electronic devices. Features & Benefits High performance, low cost Excellent stability ±0.1% FS or ±0.25% FS accuracy High integrity and reliability Fully welded titanium with 5 year corrosion warranty Output: 2-wire, 4-20mA Internal lightning protection (IEC 61000-4-5 Level 4)