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

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 61508-2
  • 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.

Related products

Product details

Product category Guided radar (TDR) level transmitter
Alternative product categories Micropulse radar, Flex radar, Guided wave radar (GWR), TDR, Micropower impulse radar MIR, Freespace radar, Guided microwave

Technical data

Product type Level transmitter
Measurement principles Guided radar
Level measurement type Continuous measurement
Measured media Granulates, Powders, Slurries, Pastes, Liquids, Solids, Bulk solids
Contact to measured medium Yes
Interface measurement No
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 length 4…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 parts Austenitic stainless steel (1.4404/316L), Austenitic alloy (2.4602/Alloy 22)
Process seals PFA, FKM/FPM, Kalrez® 6375, EPDM
Accuracy (liquids) ±3 mm/
±0.12 in
Accuracy (solids) ±3 mm/
±0.12 in


Certificates/Approvals Ex INMETRO, cFMus, IECEx, EAC, ATEX, NEPSI
Certificates/Approvals Safety SIL2
Certificates/Approvals Hygienic FDA, EC 1935/2004
Certificates/Approvals Others WHG, CRN, NACE, EAC
Ingress protection IP66/67, NEMA4X/6P


Digital outputs FOUNDATION™ fieldbus, PROFIBUS® PA, HART®
Analogue outputs Current (mA)

Process connections

Flange connections EN (1092-1): DN25…200
ASME (B 16.5): 1…8"
Thread connections Male:
G1/2, G3/4, G1, G1 1/4, G1 1/2
1/2 NPT, 3/4 NPT, 1 NPT, 1 1/4 NPT, 1 1/2 NPT
Hygienic connections Dairy screw (DIN 11851): DN40, DN50
Tri-Clamp®: 1 1/2", 2"

Download Center

  • Technical datasheets and handbooks
  • Flyers and brochures
  • Certificates and approvals
  • Software and driver
View OPTIFLEX 2200 related downloads