Huba 681 Level transmitter
Measuring range : 0 ... 0.1 – 25 bar
Output : 0 ... 5 V / 0 ... 10 V / 4 ... 20 mA
Media : Diesel oil / Fuel oil / Kerosene / Salt water / Brackish water / Drinking water / Potable / Lake water / River water / Benzene / Chlorinated water
Cable : PUR / PE / Teflon
Features
The pressure transmitters of Type 681 with piezoresistive measuring elements have compensated, calibrated, and amplified sensor signals, which are provided as standardized voltage or current outputs. In the version as a submersible probe with saltwater- and oil-resistant connection cable, they are particularly suitable for level measurement of aggressive liquids. For ambient pressure compensation, a tube is routed through the cable. All metal parts made of stainless steel are hermetically welded.
•Mechanically protected membrane through special head design
•100 % sealed against medium, as fully welded
•Better stabilization of the sensor in turbulent media through additional weight (option)
•High overload safety due to chemically etched chip membrane and special design of the glass feedthrough
•Compact design in SMD technology increases operational safety during shock and vibrations
Specification
| Product feature | |
|---|---|
| Pressure measuring range | 0 ... 0.1 – 25 bar |
| Pressure measuring range | optionally available (Absolute) |
| Field of application | |
| Permissible overload | 3x Pressure range |
| Bursting pressure | <200 bar |
| Media |
|
| Medium temperature | -5 ... 80 °C |
| Material | |
| Housing | Stainless steel 1.4435 (316L); Titanium |
| Sealing material | FPM |
| Cables | Teflon / PUR / PE |
| Electrical data | |
| Supply voltage 3-wire | 13 ... 30 VDC |
| Current consumption 3-wire | 0 ... 10 V |
| Permissible load 3-wire | >10 kOhm |
| Supply voltage 2-wire | 9 ... 33 VDC |
| Current consumption 2-wire | 4 ... 20 mA |
| Permissible load 2-wire | < (supply voltage - 9V)/0.02 A (max.) |
| Supply voltage 2-wire (Ex) | 9 ... 28 VDC |
| Current consumption 2-wire (Ex) | 4 ... 20 mA |
| Permissible load 2-wire (Ex) | < (supply voltage - 9V)/0.02 A (max.) |
| Cable length | various lengths |
| Explosion protection | |
| ATEX Gas | II 1G Ex ia IIB/IIC T3 ... T6 |
| ATEX Dust | II 1D Ex iaD 20 IP6x T145 ... T70 ÀC |
| Standards Gas | EN 60079-0 / EN 60079-11 |
| Standards Dust | EN 61241-0 / EN 61241-11 |
| Temperature class | T6; T4 |
| Approval | |
| Interference emission | EN 55022 |
| Shock | EN 60068-2-27 |
| Vibration | EN 60068-2-6 |
| Interference resistant | EN 61000-4-2; EN 61000-4-3; EN 61000-4-4; EN 61000-4-5; EN 61000-4-6 |