| Dimension range | PN | Temperature range | Material |
|---|---|---|---|
G 1 | 40/100 | -20°C to +70 ºC -60°C to +280 ºC | Stainless steel |
Level sensors for level indication in tanks.
| 1 | Body | Plastic |
| 2 | Connection and neckline | Stainless steel 1.4541 |
| 5 | Media-enabled parts | Stainless steel 1.4541 |
| AT7721 | |
|---|---|
| A | *Max measurement range |
| B | *Chain length (standard 96mm, at PN100 192mm) |
| C | 420 |
| D | 75 |
Level sensors for different types of tanks and containers. Level range 150 mm to 4000 mm. Level is determined by calculating the weight of the device in the chain. The unit has some fluidity and, by weight, the level can be calculated. It is therefore important that the type of media, density and temperature is stated when ordering so that the level sensor can be calibrated correctly. The length of the chain must also be stated when ordering. Level sensors are provided with LED indication 10 points and as an option, the level sensor can be ordered with digital display display.
The level sensor is available in two versions AT7720 and AT7721. The AT7720 has a short neck and can handle the temperature range -20°C to + 70°C and pressure class PN40/PN100. The AT7721 has a longer neck with cooling flanges and can handle the temperature range -60°C to + 280°C and pressure class PN40/PN100. The level sensor has an electrical output of 4-20mA, cable connection, IP class 65. The level sensor is powered by 24 VDC.
| Supply voltage | 24VDC |
| Electrical connection | Cable entry |
| Resolution | 0,1% |
| Output signal | 4-20 mA, three-wire |
| Density area | 500 to 1500kg/m3 |
| Ambient temperature | 0°C to +70°C |
| Media temperature AT7720 | -20°C to +70°C |
| Media temperature AT7721 | -60°C to +280°C |
| Inaccuracy linearly | max 2% |
| Protection class | IP65 |
The level sensor is installed vertically at the top of the tank. If turbulent in the tank, level sensors can be installed in a tube, connected to flanges on the outside of the tank. To reduce the risk of temperature impact, the pipe can be insulated.
If possible, the AT7721 should be installed for at least one hour after installation in the tank and adjust to temperature and ambient temperature before electrical installation.
The level sensors shall not be exposed to static electricity or magnetic fields that may affect the electronics and measurement accuracy.
Electrical installation according to schedule.
| AT7721-1500 | |
| AT 7721 | 1500 |
|---|---|
| Fig. no | Measuring range (Max 4000mm) |
