1. 3.7" LCD monitor, 192*64 pixels, 64KB FlashROM, 1KB SRAM, 7 ... every 30 minutes)18) Weight: 1 lb19) Relative Humidity: 20 ~ 85% non condensing20) IP 65F Model Function OP3203. ... keys, RS232/RS422OP320-A3.7 inch monochrome LCD, 192*64 pixels, 20 function keys, RS232/RS422OP320-S3.7 inch ... , RS232/RS485OP320-A-S3.7 inch monochrome LCD, 192*64 pixels, 20 function keys, RS232/RS485MP330-SOperate panel with ...