| 644 | Rosemount 644 Temperature Transmitter |
| H | Transmitter Type and Measurement Configuration: DIN A Head Mount - Single Sensor Input |
| A | Transmitter Output: 4-20 mA with digital signal based on HART protocol |
| K1 | Product Certifications: ATEX Flameproof; Intrinsic Safety; Type n; Dust |
| J8 | Enclosure Options | Material | Conduit Entry Size: Universal Head (Junction Box) with 50.8mm (2-in.) SST pipe bracket | Cast SST | ½-14 NPT |
| Q4 | Calibration Certificate: Calibration Certificate (3-Point Calibration) |
