1. ±2mm High Accuracy

TOKYO KEIKI’s advanced pulse technologies achieve ±2mm accuracy.

2. Advanced Echo Processing

“Multi-echo Historical validation” checks trend continuity to track the echoes from the liquid during process operation for smooth measurement. And, “Auto Noise Table Function” achieves stable and continuous level measurement on the Reactor tank application.

3. Rapid Tracking

“Full-range Search Mode” boosts detection speed and tracks up to 2m/sec level change.

4. Flow & Volume Calculation

“Extended Calculation Mode” outputs not only Tank Volume but also Open Channel Flow Rate by Weir & Flume combination.

5. Wide line-up for various applications

KRG-10 can be installed for Corrosive, Adhesive and Hygienic applications by various antennae; Standard Cone, PTFE-Sealing and PFA-Rod. 4″ down to even 1″ tank nozzle can be applicable.

General Specification Frequency 26GHz
Beam Angle 8◦ (4inch Cone antenna & PTFE Sealing antenna)
12°(3inch PTFE Sealing antenna)
18°(2inch Cone antenna & PTFE Sealing antenna)
25°(1inch Rod antenna)
Measurement MAX range 30m
Accuracy Cone & PTFE Sealing ±2mm
Rod ±3mm
Repeatability ±1mm
Interval 1s
Tracking Rate 2m / sec max.
Display 5 digits LCD / 4 keys-menu-driven

Level, Distance, Volume (Flow), Current, Signal strength selectable

Power Supply Signal Output Power Supply (Loop-Powered) DC10.5V ~ 36V (In case of Ex, the voltage is rated separately.)
Signal Output 4 ~ 20mA + HART
Alarm Hold, 22mA or 3.6mA selectable
Ambient Temperature −40 ~ + 70°C (Non-Ex) / −40 ~ + 60°C (Ex)
Mechanical Specification Tank Pressure 1.5MPa
Tank Temperature −40 ~ + 200°C
IP Class IP66/67
ATEX II 1 G Ex ia IIC T4 Ga Ta = -40°C to +60°C,IP66

II 1 D Ex ia IIIC T135°C Da Ta = -40°C to +60°C, IP66

II 1/2 G Ex ia/db IIC T4 Ga/Gb Ta = -40°C to +60°C, IP66

IECEx Ex ia IIC T4 Ga Ta = -40°C to +60°C,IP66

Ex ia IIIC T135°C Da Ta = -40°C to +60°C, IP66

Ex ia/db IIC T4 Ga/Gb Ta = -40°C to +60°C, IP66

KC s Ex ia/d IIC T4 Ga/Gb
Function – Multi-echo historical validation

– Bottom echo handler

– Volume calculation

-Disturbance noise elimination

– Double bounce handler

– Predict Output

– Distance filter window??

– Full-range search mode

– Flow rate calculation (Weir / Flume)

Advanced performance

The measuring principle is based on Time-of-Flight by microwave pulse technology.

  • Non-contact measuring
  • Non-mechanical moving parts
  • High reliability, Easy maintenance
  • High sensitivity
  • Density, Pressure and Temperature less affected
  • Loop Power System (2-wire)
  • 4-20mA with HART protocol
  • Wide antenna range
  • Interactive Windows-based setup software
  • Built-in display / 4 keys menu driven
  • LCD 90° step rotation for better visibility

Measuring principle

KRG-10 measures liquid levels by transmitting radar pulses towards the liquid surface and receiving the radar echoes. The travel time for the radar pulse is proportional to the distance between the gauge and the surface.

Upon reception, microprocessors and intelligent software in the gauge head analyze the echoes and transform them into level output data.

The radar pulse is virtually less affected by the tank content and atmosphere, temperature or pressure. Thus, radar measurement is proven to be the most reliable gauging method in the most applications.

Furthermore, maintenance requirements are in fact zero that as no part of the gauge is in physical contact with liquid.

And KRG-10 has a function to remove unwanted echo. By using this function, the user can prevent the erroneous recognition of the reflected wave by unwanted echo.

All this makes KRG-10 very well suited for process tank applications in the chemical and water industry.

Stable Measurement

Disturbance Noise Elimination

Cyclical & Multi-bounce noise echoes are eliminable for stable output. It realizes stable measurement without leap in process tank measurement.

Predict Output

As the result of echo validation, KRG-10 can output predicted data reasonably.

Distance Filter Window

This window is effective for echo searching, and variable ranging available.

Bottom Echo Handler

Generally, liquids having low dielectric constant are difficult to be divided surface echo from tank bottom echo when its level is quite low and close to bottom. KRG-10 can deem the level is close to almost bottom without fluctuation.

Double Bounce Handler

Delayed echo by multi-bounce between liquid surface and tank ceiling will be eliminated.


KRG-10 is available to measure both of calm surface liquid such as storage tanks or buffer tanks and ruffled surface liquid such as reactor tanks.

  • Chemical and petrochemical
  • Refinery
  • Pharmacy
  • Food and beverage

Also it will be available in Water industrial such as

  • River intake gate
  • Process in waterworks
  • Water reservoir
  • Sewage water treatment plant
  • Hydraulic power station
  • River and dam
  • Coolant pit in steel Process
  • Discharge outlet for flow metering