904 radar level gauge installation must know three points
1. For the HBRD904 parabolic radar, the length of the standard
antenna is short. In most cases, the antenna cannot be extended to
take over the tube. Because the transmission angle of the parabolic
antenna is smaller (4 °), when the tube is less than 300mm, the
antenna will not have a small impact on the measurement (The
antenna has the strongest signal when it reaches the tank).
2.HBRD904, when the takeover is larger than 300mm, you need to
choose an extended parabolic antenna. The extended parabolic
antenna will also affect the signal amplitude, so the ideal state
during installation is to find a place where the thickness of the
tank roof is thin, and it is not necessary to lengthen the antenna,
such as the observation port.
3.Purge interface, the thread specification of solid-state radar
purge interface is 1 / 8NPT, 8mm diameter fast purge connector on
the interface
High-frequency radar level gauge parameters
1.temperature:Solid standard type: -40 ~ 130 ℃ High temperature
type: -40 ~ 240 ℃ "；
2.application: Measurement of powder, granules, blocks and other
solids;
3.output signal:RS485 output signal with single selection
4.Explosion proof:Single-cavity intrinsically safe explosion-proof
type: Exia IIC T6 Ga, when using on-site in explosion-proof
occasions, it is required to install a safety barrier in the
control room；Double-chamber flameproof type: Exd IIC T6, no need
for central control and no safety barrier when used in
explosion-proof occasions. When on-site power is 220V, only
dual-chamber radar can be selected.
Product type
There are two types of HBRD901 rod radar antennas: 100mm and 200mm.
When the takeover is longer, it will not seriously affect the
measurement and will increase some blind spots.
HKD901 Radar level
| advantage | disadvantage |
Resistance to slight condensation, suitable for corrosive
environments with small flanges (minimum DN50) within 10m, small
acid gas or steam in the tank
| HKD901 radar is not suitable when the temperature in the tank is
high, sour gas or steam is large. The dead zone of HKD901 radar is
generally less than 0.3m. It can only measure the environment of
normal pressure, and can not add high temperature heat sink. |
High-frequency radar level gauge parameters
| temperature | "The ambient temperature requirement is -30 ~ 65 ° C. If it is
below -30 ° C, heat tracing is required.
Process temperature range
Solid standard type: -40 ~ 130 ℃
High temperature type: -40 ~ 240 ℃ " |
| application | Measurement of powder, granules, blocks and other solids; hydraulic
and liquid conditions |
| output signal | RS485 output signal with single selection |
| Explosion proof | "Single-cavity intrinsically safe explosion-proof type: Exia IIC T6
Ga, when using on-site in explosion-proof occasions, it is required
to install a safety barrier in the control room
Double-chamber flameproof type: Exd IIC T6, no need for central
control and no safety barrier when used in explosion-proof
occasions. When on-site power is 220V, only dual-chamber radar can
be selected
" |
| Protection class | IP67 |
| power supply | 12-24VDC/220VAC |
