SRZ-TC Helical PD flow meters with tungsten carbide sleeve bushing were designed for measuring high viscosity, abrasive, and filled fluids as well as lubricating and non-lubricating fluids. Temperature fluctuations and the resulting change in viscosity of the fluid only marginally affect the measuring accuracy of these helical gear flow meters. Practical applications include:

  • Polyurethanes and polymers
  • Adhesives and sealants
  • Petrochemical products
  • Light and heavy fuel oil
Technical Specifications
Measuring Accuracy:

±0.5% over full range with 30cP fluid


± 0.05%

Flow Measuring Ranges:

SRZx-40TC:  0.1 to 10.6 gpm  |  0.4 to 40 lpm
SRZx-100TC:  0.26 to 26.4 gpm  |  1.0 to 100 lpm
SRZx-400TC:  1.1 to 105.7 gpm  |  4.0 to 400 lpm

Maximum Operating Pressure:  

4,500 psi  |  315 bar

Fluid Temperature Range:

-40°F to 302°F (-40°C to 150°C)


NPT standard, BSPP optional

Turn Down Ratio: 


Materials of Construction:
  • Body:  303 Stainless Steel or 316L Stainless Steel
  • Helical Gears:  Stainless Steel (DIN 1.4122) (QPQ coating)
  • Index Gear:  Stainless Steel (DIN 1.4122)
  • O-ring:  FKM or PTFE
  • Sleeve Bushing & Shafts:  Tungsten Carbide
  • Bolts:  Zinc Flake Coated Carbon Steel
Output Options
Choose from a wide variety of pickups, sensors, monitors, and controllers to pair with your gear meter: 
  • Frequency
  • Analog (voltage or 4-20mA)
  • Battery, loop, or DC powered displays



Part Number Guide