Negele VNV-E Product Information

Product Information
External Level Switches for
Conductive Level Sensors
Application
• level detection of fluid and conductive media in vessels
(min. conductivity 1µS/cm but depending on the level
switch)
Application Examples
• full- / empty detection in vessels and pipes
• level control in vessels
• overfill protection in vessels
• dry running protection in pipes (e.g. pump protection)
Features
• measurement signal free of DC-voltage
• only one unit for up to 4 levels
• CE-lable
Options / Accessories
• high sensitive version up to 1MOhm available
• version with wire-loop-control available
Version with 24VDC output; Power Supply 24VDC
Sensitivity
Type
VNV-E
0,1...100kOhm
VNV-D 0,1...100kOhm
VNV-DU
0,1...100kOhm
0,1...10KOhm
ZNV-Z 0,1...100kOhm
VNV-V
0,1...100kOhm
Version with relay output; Power Supply 230VAC (Option: 115VAC, 24VAC)
Type Sensitivity
VNV-S 0,1...100kOhm
VNV-SD
0,1...50kOhm
VNV-WEV 0,1...100kOhm
VNV-WD 0,1...100kOhm
VNV-WDV
0,1...100kOhm
VNV-W 50kOhm fest
Option H 0,1...1MOhm
Explanation considering the VNV-WD:
* Level detection: The output is switched as soon as the electrode EO2 gets contact to the medium. It's switched off again when the electrode
looses contact to the medium.
** Level control: The output is switched on as soon as EU1 looses contact to the medium. It keeps switched on until the electrode EO1 gets
contact. When EO1 gets contact, the output is switched off and keeps switched off until EU1 looses contact to the medium again. If you only
use M and EO1 of the level control, it works like a level detection.
Order Code
version with 24VDC power supply
(no further options)
VNV-E
VNV-D
VNV-DU
VNV-V
ZNV-Z
Negele Messtechnik GmbH • Raiffeisenweg 7 • D-87743 Egg a. d. Günz • Telefon +49 (0) 83 33 / 92 04-0 • Fax +49 (0) 83 33 / 92 04-49
VNV-E
VNV-S
Function
1 level control**; switch-on / off delay time adjustable (0,5...10sec.)
1 level control** and 1 level detection*
switch-on / off delay time adjustable (0,5...10sec.)
1 level control** and 1 level detection*
switchable sensitivity
2 level detection*
4 level detection*
Function
1 level control**
1 level control**
1 level control**; switch-on / off delay time adjustable (0,5...10sec.)
1 level control** and 1 level detection*
1 level control** and 1 level detection*
switch-on / off delay time adjustable (0,5...10sec.)
1 level detection*
version with AC high sensitive version
power supply (up to 1MOhm)
VNV-S X standard
VNV-WEV H high sensitive
VNV-WD, -WDV
VNV-W not possible
VNV-SD
Order example: VNV-WEVH / 230VAC
VNV-E, -D, -DU, -V, ZNV-Z
VNV-S, -WEV, -WD, -WDV
VNV-D ZNV-Z
VNV-WEV VNV-WD
power supply
230VAC*
115VAC*
42VAC
24VAC
VNV-V
VNV-WDV
VNV-WD
* Pay attention to the
note on page4!