26GHz NYRD-805 Radar Level Meter

The NYRD805 radar level meter is a 26GHz high-frequency radar level measuring instrument with a maximum measurement distance of 10 meters. The antenna is further optimized, and the new fast microprocessor can perform higher-speed signal analysis and processing, so that the instrument can be used in some complex occasions such as steam, foam, dust, crystallization, condensation, etc..

Radar Level Meter Technical Parameter

Application	various corrosion liquid
Antenna material	PTFE
Measurement range	10m
Frequency range	26GHz
Accuracy	±3mm
Medium temperature	-40C~130℃
Process pressure	-0.1〜0.3MPa
Power supply	24VDC (two lines, four lines)
Process connection	Thread, Flange
Protection grade	IP67
Explosion-proof grade	Exia II C T6 Ga/ Exd ia IIC T6 Gb
Signal output	4... 20mA/HART (two / four) RS485/Modbus...

※ Note: Products can be customized according to the specific requirements of users!

Radar Level Meter Operating Principle

The radar level antenna emits narrow microwave pulses, which are transmitted downward through the antenna. After the pulse touches the surface of the measured medium, it is reflected back and received by the antenna system again, and the signal is transmitted to the electronic circuit part and automatically converted into a level signal (because the pulse propagation speed is extremely fast, the electromagnetic wave reaches the target and is reflected back to the receiver. The time taken is almost instantaneous).

Radar Level Meter Design Features

◎ The antenna is small in size, easy to install; non-contact radar, no wear and no pollution.

◎ Unaffected by corrosion, foam, water vapor, temperature and pressure changes.

◎ The beam angle is small and the energy is concentrated, which enhances the echo ability and helps to avoid interference.

◎ The measurement blind area is smaller, and it can also achieve good results for small tank measurement.

◎ High signal-to-noise ratio for better performance even under fluctuating conditions.

Radar Level Meter Installation requirements

• The radar level meter i s installed at 1 / 4 or 1 / 6 of the tank diameter. Note: The minimum distance f rom the tank wall should be 500 mm  : ①Datum plane , ②Containercenteroraxisofsymmetry.

Radar Level Meter Wrong installation

• The conical tank cannot be installed above the inlet  .Note: sunshade and rainproof measures should be taken when installing outdoors. Figure 4 : ①Right, ②Wrong

• When there are obstacles in the tank that affect the measurement, a reflector must be installed to measure normally. Figure 5:①Right,②Wrong

Radar Level Meter Electrical connections

Supply voltage

(4~20)mA/HART(Two-wire

The power supply and the output current signal share a two-core shielded cable. Refer to the technical data for the specific supply

voltage range. For the intrinsically safe type, a safety barrier must be added between the power supply and the instrument.

(4~20)mA/HART(Four-wire)

The power supply and the current signal are separated, and each uses a two-core shielded wire. Refer to the

technical data for the specific supply voltage range.

RS485/Modbus

The power supply and the Modbus signal are separated, and each uses a two-core shielded wire. Refer to the

technical data for the specific supply voltage range.

Connection method

Radar Level Meter Protection Class

This instrument fully meets the requirements of protection class IP66/67. Figure 6:

• How to Ensure Your Installation Meets IP67 Requirements:
• Make sure the sealing head is not damaged.
• Make sure the cable is not damaged.
• Make sure that the cables used meet the electrical connection specifications. Bend the cable down before entering the electrical interface to ensure that water does not flow into the housing, see ①
• Please tighten the cable gland,see②
• Please plug the unused electrical connections with blind plugs, see ③

Radar Level Meter Instrument deb ing

The instrument has three deb ing methods, as follows:

Method 1:Display/Key

The instrument is deb ed through the 4 buttons on the display screen. (Figure 7) ①LCD; ②Button.

Method 2:Host computer deb ing

Connect to the upper camera through HART (Figure 8)

①RS232 Or USB；②Radar level meter；③HART adapter；④250Ωresistance

Method 3:HART handheld programmer programming

HART handheld programmer (Figure 9)

①RS232 Or USB；②Radar level meter；③250Ωresistance