Monitors water installations etc. and protects equipment, e.g. computer equipment and similar.
Electronic humidity alarm
Measures the conductivity of the sensor circuit
Adjustable sensitivity 2-20µS
Built-in output relay 250V / 10A
Special nylon sensor tape available
Audible alarm (NVP-16) L
ED for alarm mode
LED for normal operation
Product Range
|
Type |
Product |
EAN-Nr |
|
NVP-15 |
Humidity alarm 230V, 10A relay |
5703502410142 |
|
NVP-16 |
Humidity alarm with audible alarm signal |
5703502410135 |
Accessories
|
NVPF-16 |
Clamp-on pipe sensor |
5703502560007 |
|
NVPF |
Sensor tape by the metre |
5703502510736 |
|
NVPFL |
Glue for sensor tape |
5703502510811 |
Application
Monitors water installations etc. and protects equipment, e.g. computer equipment and similar. For NVP a nylon sensor tape is available (by the metre length). This tape is installed in the floor or wound/glued on a water pipe. Only a few drops of water will activate the NVP alarm. NVP can also be applied for overriding valves in cooling ceilings to protect against condensation on pipes or valve.
Function
NVP measures the electric conductivity in a sensor circuit. When the conductivity of the sensor exceeds the value set on NVP (i.e. when the sensor is wet) the built-in relay is activated and the red LED lights (alarm). NVP-16 has the same function. However, both a relay and the built-in audible alarm is activated.
Safety function
An alarm is given if the sensor cable is disconnected or short-circuited.
Technical data
| Supply voltage |
24V AC, 230V AC ±10%, 50-60 Hz |
| Power consumption |
3 VA |
| Ambient temperature |
-20/+50°C |
| Sensitivity |
2-20µS, 500-50 kohm |
| Sensor voltage |
Max. 8V DC |
| Relay output |
Max. 10A / 250V |
| Acoustic alarm (NVP-16) |
Approx. 55 dB |
| Weight |
190 g |
| Dimensions L x W x D |
86 x 52.5 x 58 mm |
| Housing |
IP 20 |
Sensor
The sensor tape NVPF is made of cotton (20 mm) and has two interwoven wires.
The sensor tape can be supplied in various lengths according to customer specification and is mounted in the place where protection against water is needed. However, the tape should not be mounted where it may become wet under normal circumstances, e.g. on damp walls. The sensor tape is terminated with a 680 kohm resistance (included in NVP) and must not be earthed.
The glue type NVPL is a porous glue which is water-permeable. Normal glue consumption is about 0.3 litre per 25 m sensor tape. The humidity alarm type NVPF-16 is for direct mounting on pipes, e.g. protection against condensation. NVPF-16 has a built-in 680 kW resistance and is connected to NVP with two terminals.
Mounting
NVP is mounted in control cubicle on DIN-rail. Terminal 13 may be used as looping terminal.
Sensor location
Chilled beam or ceiling mounted piping: In order to protect a room with water piping above the ceiling the sensor tape is secured underneath the outer side of the insulation. If the pipe leaks, the sensor tape will become wet and NVP will give out an alarm. Room with floor drain: The sensor tape is glued around the floor drain and will thus become wet if water comes out of the drain from below or if water runs across the floor towards the drain.
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