Guided radar (TDR) level transmitter for storage and process applications

  • Continuous measurement of level, distance, volume, mass or dielectric constant
  • Measuring range: 0.6…40 m / 2…131 ft (liquids), 0.6…20 m / 2…65.5 ft (solids)
  • -50…+300°C / -58…+572°F; -1…40 barg / -14.5…580 psig
  • Icon/Logo Security Integrity Level 2 (SIL 2)

OPTIFLEX 2200 C – Compact / vertical version with single cable

Guided radar (TDR) level transmitter OPTIFLEX 2200 C – Compact / vertical version with single cable

The OPTIFLEX 2200 is a 2-wire (4…20 mA) guided radar level transmitter based on the Time Domain Reflectometry (TDR) technology. Offering a large variety of probes, the device is designed for liquids and solids in midrange applications of the chemical industry as well as the oil and gas, energy, water and wastewater, mining or pulp and paper sectors. This guided radar is also a replacement for traditional level transmitters that require higher maintenance such as displacer and pressure level transmitters.

Product highlights

  • With DPR (Dynamic Parasite Rejection): dynamically eliminates false reflections from environmental disturbances and product build-up
  • Accuracy:±3 mm /±0.12" uncertainty
  • SIL2-compliant according to IEC 61508
  • Quick coupling system: converter is rotatable and removable under process conditions
  • Horizontal or vertical housing position to suit every installation
  • Stainless steel housing for corrosive environments
  • Optional weather protection
  • Remote converter: mounting up to 100 m / 328 ft from the antenna
  • Wetted parts made of stainless steel, Hastelloy®C or PVDF
  • Hygienic probes and process connections for the food and beverage as well as pharmaceutical industry
  • NACE design (MR 0175 / MR 0103 / ISO 15156)
  • Converter backwards compatible with previous TDR radar generations made by KROHNE

Typical applications


  • Storage and process applications
  • Applications requiring SIL safety loops and hazardous area approvals
  • Locations where it is difficult to access the tank roof (remote version recommended)

Chemical and petrochemical industry

  • Solvents, alcohols, bases, acids and ammonia

Oil and gas industry

  • Condensates (no interface) and hydrocarbons

Power industry

  • Fuel control of emergency generators and cooling water

Food and beverage industry

  • Sugar, gluten, starch and vegetable oil

Water and wastewater industry

  • Chlorine, lime, ports, water treatment and navigation locks

Minerals and mining industry; iron, steel and metal industry

  • Lime, cement, carbonate etc.


Technical data

Measurement principlesGuided radar
Level measurement typeContinuous measurement
Measured mediaBulk solids, Granulates, Liquids, Pastes, Powders, Slurries, Solids
Contact to measured mediumYes
Interface measurementNo
Probe diameter
  • Double rod
  • Single rod
  • Single rod (segmented)
  • Coaxial
  • Coaxial (segmented)
  • Double cable
  • Single cable Ø2 mm / 0.08"
  • Single cable Ø4 mm / 0.15"
Probe length4…40 m/
13…131 ft
Measuring range (liquids)0.6…40 m/
2…131 ft
Measuring range (solids)0.6…20 m/
2…65.5 ft
Process pressure (relative)-1…40 barg/
-14.5…580 psig
Process temperature-50…150°C/
Wetted partsAustenitic stainless steel (1.4404/316L), Austenitic alloy (2.4602/Alloy 22)
Process sealsEthylene propylene diene monomer (EPDM), Fluorocarbon-based synthetic rubber (FKM/FPM), Kalrez® 6375, PFA
Accuracy (liquids)±3 mm/
±0.12 in
Accuracy (solids)±3 mm/
±0.12 in


Certificates/Approvals ExATEX, cFMus, EAC Ex, IECEx, INMETRO, NEPSI
Certificates/Approvals SafetySIL2
Certificates/Approvals HygienicEC 1935/2004, FDA
Certificates/Approvals OthersCRN, EAC, NACE, WHG
Ingress protectionIP66/67, NEMA4X/6P


Digital outputsFOUNDATION™ fieldbus, HART®, PROFIBUS PA
Analogue outputs4…20 mA

Process connections

Flange connectionsEN (1092-1): DN25…200
ASME (B 16.5): 1…8"
Thread connectionsMale:
G½, G¾, G1, G1 1/4, G1 ½
½ NPT, ¾ NPT, 1 NPT, 1 1/4 NPT, 1 ½ NPT
Hygienic connectionsDairy screw (DIN 11851): DN40, DN50
Tri-Clamp®: 1 1/2", 2"

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