SRL610 Series – Rigid Rod Guided Wave Radar (GWR) Level Transmitters
SRL610 Series – Rigid Rod Guided Wave Radar (GWR) Level Transmitters

Rigid Rod Guided Wave Radar (GWR) Level Transmitters | SRL610 Series

Continuous contact level transmitter utilizing advanced high-frequency Guided Wave Radar (GWR) technology (500MHz – 1.8GHz). Specially engineered for rock-solid, precise level and interface measurement in liquids, oils, low-dielectric fluids, and heavy industrial process tanks with high agitation or extreme temperatures. Configured as a Variable Product: choose your specialized probe assembly from the dropdown menu to perfectly match your processing environment (Standard, High-Temperature, or Coaxial).

  • Signal Output: 4-20mA / HART / RS485 Modbus.

  • Safety & Explosion Protection: Intrinsically safe and flameproof configurations (Exia IIC T6 Ga / Exd ia IIC T6 Gb).

  • Measurement Principle: Direct physical wave guidance eliminates errors from steam, heavy condensation, dust, foam, or shifting fluid density.

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Description

The SRL610 Series rigid rod GWR transmitter is the industrial answer for challenging applications where non-contact ultrasonic or free-space radar sensors fail due to structural tank obstructions, tight installation ports, or heavy surface turbulence. By guiding high-frequency microwave pulses directly down a solid metal rod, the signal remains perfectly contained, delivering precise, linear level readings all the way to the bottom of the vessel.

Through this consolidated page, you can dynamically configure your sensor by selecting one of three specialized engineering variants:

  • Standard Industrial Rod (SRL612): The ideal solution for standard industrial liquids, water processing, and mid-sized storage applications up to 5 meters in depth.

  • High-Temperature & High-Pressure Rod (SRL614): Inbuilt with a heavy-duty thermal isolation segment, this variant operates flawlessly in continuous process conditions up to 400°C and 4.0 MPa. Excellent for boiler steam drums and thermal oil systems.

  • Coaxial Tube Probe (SRL616): The rod is fully enclosed within a concentric metal pipe. This creates a benchmark 100% shielded environment that completely blocks out interference from heavy mechanical agitators while dramatically amplifying weak echo reflections on low-dielectric fluids (such as light oils, deoxidized water, and solvents).

Additional information

Probe Configuration

Coaxial Probe (SRL616), High-Temperature Rod (SRL614), Standard Rod (SRL612)

Features

  • Echo Discovery Technology: Advanced microprocessor algorithms isolate the true liquid level echo, instantly screening out false reflections from structural obstructions.

  • True Contact Measurement: Immune to ambient temperature fluctuations, thick surface foam, vacuum states, or product buildup on the probe rod.

  • Ultra-Low Microwave Emission: Emits low-power pulse signals that are completely safe for personnel and the surrounding environment.

  • Flexible Process Integration: Available with a wide selection of threaded or flanged process connections for effortless retrofit on existing tank nozzles.

 

Specification

Parameter SRL612 (Standard Rod) SRL614 (High Temp / Press) SRL616 (Coaxial Tube)
Primary Application

Liquids and powders without heavy agitation

Sealed process tanks, extreme thermal environments

Low dielectric fluids / turbulent mixing tanks
Measuring Range

Up to 5 meters

Up to 15 meters

Up to 6 meters
Measurement Accuracy

±10 mm

±10 mm

±5 mm
Process Temperature

-40°C ~ +250°C

-200°C ~ +400°C

-40°C ~ +250°C
Process Pressure

-0.1 ~ 4.0 MPa

-0.1 ~ 4.0 MPa

-0.1 ~ 4.0 MPa
Frequency Range

500 MHz – 1.8 GHz

500 MHz – 1.8 GHz

500 MHz – 1.8 GHz
Signal Output

4-20mA / HART / Modbus

4-20mA / HART / Modbus

4-20mA / HART / Modbus
Power Supply

2-wire (24V DC) / 4-wire

2-wire (24V DC) / 4-wire

2-wire (24V DC) / 4-wire
Protection Class

IP67 (Aluminum/Plastic Housing)

IP67 (Aluminum/Plastic Housing)

IP67 (Aluminum/Plastic Housing)

FAQ

Q: What unique advantage does the SRL616 Coaxial probe provide?

A: The outer coaxial tube acts as a dedicated bypass chamber. It prevents the radar signal from expanding outward, meaning it completely ignores nearby tank walls, internal ladders, or massive agitator blades while maximizing echo returns on challenging fluids like pure oils.

Q: Can these GWR sensors measure the oil-water interface layer?

A: Yes. Because the microwave pulse can partially pass through a low-dielectric upper layer (like oil) and completely reflect off a high-dielectric lower layer (like water), it can track both the total level and the exact boundary layer between them.

Q: What are the clearance rules for installing single-rod variations?

A: For the single-rod SRL612 and SRL614 models, ensure a minimum clearance distance of ≥300 mm from the tank wall and≥200 mm from any internal structural obstructions like heating coils or baffles.

Downloads

Rigid Rod Guided Wave Radar (GWR) Level Transmitters | SRL610 Series – Datasheet

 

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