... ,with EX-proof 2,nice design Ex-Proof limit switch box- Enclosure: Aluminum Die-casting, weather proof-IP67/NEMA 4&4× & ... visual position indicator - Swithches: 2, 3 or 4 × SPDT mechanical switch or proximity Option: Potentiometer(0-1, 5, 10K ohm). Position ... Transmitter(4-20mADC) - Cable Entry: 2× 3/4"NPT(std. ). Option: M20, M25, PF3 ...