| Alternate Mfr Part Number | FTM21-DN646A |
| Approvals | CSA |
| Cable Entry | NPT 3/4 |
| Class | Class II |
| Connection Type | Thread |
| Connector Material | 1.4404 / 1.4435 (Process Connection) |
| Enclosure Rating | NEMA Type 4X Enclosure |
| Function | DPDT |
| Housing Material | Die-Cast Aluminium |
| Housing Type | F18 |
| IP Rating | IP65 ; IP67 |
| Length | 20 in |
| Material | 316L (Wetted Sensor) |
| Maximum Ambient Temperature | 70 C |
| Measures | Point Level |
| Minimum Ambient Temperature | -40 C |
| Mounting Size | 1.5 |
| Mounting Type | Threaded |
| Number of Wires | 2 Wire |
| Operating Frequency | 800 Hz |
| Output Type | Binary Output (Contact) |
| Power | 1.3 W |
| Probe Type | Rod-type probe |
| Process Pressure | -1 to 25 bar |
| Protection | DIP (Ignition) |
| Sensing Mode | Vibronic measurement |
| Sensor Type | Rod |
| Series | FTM21 Series |
| Special Features | Division 1 ; Ex Designation ; Group E-G |
| Standards | ASME |
| Storage Temperature | -40 to 85 C |
| Supply Voltage | 19-253 VAC/19-55 VDC |
| Termination | Lead Wires |
| Thread Type | NPT |
| Type | Point Level Switch |
| Vibration Resistance | DIN 60068-2-27 / IEC 68-2-27: Schock 30 g; Vibration 0,01 g2/Hz |
| Voltage Rating | 19 to 253 ; 55 V |