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HWM11 Microwave Level Switch for Liquids, for Solids

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Overview

The microwave level switch determines the capacitance value at the end of the sensor and the dielectric constant value of the medium through a high-frequency electric field. Since the dielectric constant value of air is different from that of the medium, two states can be identified: covered and uncovered. Under normal circumstances, the indicator light is off to indicate uncovered, and the indicator light is always on to indicate covered, and the switch is switched.

This product has the characteristics of compact structure, strong anti-hanging performance, good stability, and wide application of media.

Features

  • Not affected by foam, can detect foam, and can also penetrate foam to detect liquid under the foam, stable detection.

  • Can use the handheld operator to set the alarm threshold on site and view the measured value

  • Can effectively detect adhesive conductive slurry, pure water, metal powder, plastic powder, ultra-fine powder, etc.


Technical Parameters


General Performance

Measurement principle

sweep frequency

Measurement hysteresis

±1mm

Medium characteristics

DC≥1.5

Response time

0.2s

Damping time

0~5s(Configurable)

Repeatability

±5mm

Working Conditions

Medium Working temperature

-20~80℃(standard)

High temperature type up to 235℃(customized)

Working pressure

-0.1~ +10MPa

Process Connection

Installation type

Standard installation; Reverse installation;

Surface roughness in contact with liquid

Ra< 0.8 μm

Wetted material

PEEK +SS304 /316L

Installation thread

G1/2’’ (M)  or customized

Probe length(include thread)

For standard type only: 50mm, 100mm, 150mm, 200mm, 250mm

Environmental Conditions

Protection level

IP67

Humidity

<98% RH, with condensation

Ambient temperature

Cable outlet type: -25~70 ℃

M12 connector type: -40~85 ℃

Storage temperature

Cable outlet type: -25~70 ℃

M12 connector type: -40~85 ℃

Output Signal

Output signal

NPN , PNP , Relay SPST

Output voltage drop

PNP:1.5 ±0.5V ,Rload=10k

NPN:1.5 ±0.5V ,Rload=10k

Output current

20mA(typical); 150mA(optional)

Leakage current

<100uA

Output short circuit protection

with

Electrical Connection

Electrical connection

M12-4P, with connecting cable 4x0.5mm2

Power supply

Power supply

12~30VDC

Start-up time

<1s

Supply current (no load)

8mA  (typical);40mA  (maximum)

Wetted surface roughness

Ra< 0.8 μm

Electrical connection

M12-4P

Output signal

NPN /PNP 1.5 ±0.5V ,Rload=10k

Relay SPST

Reverse polarity protection

Yes

Dielectric strength

500VAC

Default Factory Setting

Damping time

0s

Alarm point parameter AL1

250 (low dielectric constant medium)

550 (water-based medium)

720 (conductive slurry)

Output alarm when ≥AL1

Measurement value PV

0~1000, after calibration:

100: Probe in air

800: Probe in tap water

Alarm hysteresis

25

Protection

Parameters cannot be modified before being unlocked

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   +86-17551075580
    info@hjsensor.com
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