AM-GWR Guided Wave Radar Level Meter
1) Level range:0~30m by cable type, 0~6m by pole type.
2) Medium: liquid, solid powder.
3) High accuracy:±5mm
4) Working pressure: -0.1~40Mpa
5) Working temperature:-200℃~400℃.
6) Output:4-20mA, RS485 Modbus.
Product Details
Aumeascon’s AM-GWR Guided Wave Radar (GWR) level transmitters have become the mainstream in industrial level measurement due to their strong anti-interference capability, high accuracy, and wide range of applications. Utilizing the core principle of TDR (Time Domain Reflectometry) technology, they employ a probe (rod or cable) to achieve directional signal transmission and reflection. Unaffected by changes in temperature, pressure, dust, or density, they ensure stable measurement under complex operating conditions, making them the ideal choice for harsh industrial environments requiring continuous, precise monitoring and interface detection.
How It Works
The AM-GWR guided wave radar level meter is based on Time Domain Reflectometry (TDR) technology. It transmits high-frequency microwave pulses along a waveguide rod/cable. When the pulse reaches the medium surface, due to the difference in relative permittivity (εr) between air (εr≈1) and the medium (usually εr>1.5 for liquids), part of the pulse is reflected. The electronic unit records the time difference (Δt) between pulse transmission and reception, and calculates the liquid level height using the formula:
L = (C × Δt) / (2 × εr^0.5)
(where C is the speed of light, and εr is the relative permittivity of the medium).
Note: The measurement is not affected by medium density, temperature, or pressure, only requiring stable permittivity of the medium.
Key Advantages
Compared with traditional level meters (e.g., ultrasonic, float), guided wave radar level meters have distinct advantages:
- Immunity to Environmental Interference:
Microwave signals propagate along the waveguide rod/cable, unaffected by dust, steam, foam, or stirring. Suitable for complex working conditions.
High Measurement Accuracy
Accuracy up to ±1mm with high resolution, ideal for processes requiring strict level control (e.g., chemical reactors, food storage tanks).
Wide Range Coverage
Broad measuring range (typically 0.1m~30m), applicable to liquids, solid particles (e.g., coal powder, grains), and interfaces (e.g., oil-water separation).
Flexible Installation
Supports top or side mounting; customizable length of waveguide rods/cables for various container shapes (vertical tanks, horizontal tanks, spherical tanks).
Low Maintenance Cost
No moving mechanical parts, minimal wear, long service life; daily maintenance only requires periodic probe cleaning.
Strong Adaptability
Capable of measuring high-temperature (up to 400℃), high-pressure (up to 400bar), and corrosive media (with corrosion-resistant probes).
AM-GWR701 Guide wave Radar Level Meter
- Suitable medium:Liquid, solid powder
- Application:liquid and solid powder measurement complex process conditions
Model | AM-GWR701 Guide wave Radar Level Meter |
Measurement range | 0~30m by cable type, 0~6m by pole type |
Frequency range | 500MHz-1.8GHz |
Antenna | Cable or pole antenna |
Measurement accuracy | ±5mm |
Process temperature | -40~120℃ (standard type) -40~200℃ (high temperature type) -40~280℃ (custom type) |
Process pressure | -0.1~4 MPa |
Signal output | 4~20mA (two-wire/four-wire) Modbus-RS485 (four-wire) |
Display | 4 digital LCD |
Power supply | Two-wire (DC24V) Four-wire (DC24V/AC220V) |
Explosion-proof | Exia IC T6 Ga Exd IICT6 Gb |
Process connection | Thread/flange (optional) |
AM-GWR702 Guide wave Radar Level Meter3
- Suitable medium:Liquids, especially highly corrosive liquids
- Application:Acid, alkali or other corrosive media measurement
Model | AM-GWR702 Guide wave Radar Level Meter |
Measurement range | 0~20m by cable type, 0~6m by pole type |
Frequency range | 500MHz-1.8GHz |
Antenna | Fully sealed PTFE cable type or pole type antenna |
Measurement accuracy | ±5mm |
Process temperature | -40~120℃ (standard type) -40~200℃ (high temperature type) |
Process pressure | (-0.1~0.3)MPa(PTFE) (-0.1~1.0)MPa(PFA) |
Signal output | 4~20mA (two-wire/four-wire) Modbus-RS485 (four-wire) |
Display | 4 digital LCD |
Power supply | Two-wire (DC24V) Four-wire (DC24V/AC220V) |
Explosion-proof | Exia IC T6 Ga Exd IICT6 Gb |
Process connection | Thread/flange (optional) |
AM-GWR703 Guide wave Radar Level Meter
- Suitable medium:Liquids, especially liquids in high-temperature and high-pressure environments.
- Application:Sealed container, for measuring liquids under high pressure.
Model | AM-GWR703 Guide wave Radar Level Meter |
Measurement range | 0~15m by cable type, 0~6m by pole type |
Frequency range | 500MHz-1.8GHz |
Antenna | Ceramic single-cable or single-rod antenna |
Measurement accuracy | ±5mm |
Process temperature | (-200~400)℃ |
Process pressure | (-0.1~40)MPa |
Signal output | 4~20mA (two-wire/four-wire) Modbus-RS485 (four-wire) |
Display | 4 digital LCD |
Power supply | Two-wire (DC24V) Four-wire (DC24V/AC220V) |
Explosion-proof | Exia IC T6 Ga Exd IICT6 Gb |
Process connection | Thread/flange (optional) |
Maily Applications
AM-GWR series Guided wave radar level meters are widely used in petrochemical, food and beverage, pharmaceutical, metallurgy, and power industries. Typical scenarios include:
1.Chemical Industry
- Measuring corrosive or viscous liquids (e.g., acid-base solutions, organic solvents, polymers) for reactor level control and tank inventory management.
- Interface measurement: Monitoring liquid levels and interfaces in oil-water separation tanks or emulsion tanks.
2.Oil and Gas Industry
- Level measurement for crude oil tanks and refined oil tanks, suitable for high-viscosity crude oil and impurity-containing oil products.
- Level control in oil-gas separation units (e.g., separators, dehydrators).
3.Food and Pharmaceutical Industry
- Measuring food raw materials (e.g., syrup, edible oil, alcohol) or pharmaceutical intermediates/solvents, meeting hygienic requirements (with food-grade probes).
- Precise level control in fermenters and crystallizers.
4.Metallurgy and Power Industry
- Measuring blast furnace slag levels and molten steel ladle levels (with high-temperature probes).
- Monitoring boiler drum water levels and desulfurization slurry tank levels in thermal power plants to ensure safe equipment operation.
5.Other Fields
- Level monitoring in aeration tanks and sludge concentration measurement in sewage treatment plants.
- Grain level measurement in grain storage facilities (with cable-type probes).
