Paddle Wheel Flow Meter

Seametrics Insertion Flow Meter

The IP100/200-Series are adjustable depth insertion paddle wheels that come in brass, PVC, or 316 stainless models to fit 3” to 40” pipe. Adapters mate with standard 1-1/2” (11x/21x) or 2” (15x/25x), or PVC (11x/21x) NPT threaded fi ttings such as saddles and weldolets which may be purchased either locally or from Seametrics.

Ruby bearings and a non-drag Hall-effect sensor give these meters the widest fl ow  range of any of the paddle wheel types. A sensor detects the passge of miniature magnets in the six rotor blades. The resulting square-wave signal can be sent for hundreds of feet over unshielded cable without a transmitter and connected directly to many PLC’s and other controls without any additional electronics.

A modular system of electronics can be installed directly on the flow sensor or mounted remotely. The FT430 (externally powered with pulse), FT440 (loop powered), and FT450 (battery powered) all provide digital rate and total displays, as well as a programmable pulse; the FT440 also provides a 4-20 mA analog output. The AO55 is a blind analog (4-20 mA) transmitter. Programmable pulse for pump pacing is available with the PD10.

The “hot-tap” models (IP15x/25x) can be installed or serviced without shutting down the line by means of a 2” full-port isolation valve that comes with a nipple for installation on the pipe fitting.In most circumstances, no special tool is required.


  • Clean water
  • Large pipes
  • Aquariums, water parks
  • Water & wastewater monitoring


Pipe Size3” to 40”
PowerLow Power: 6-36 Vdc/< 2 mA
Micropowered (-04 Option): 3.1-16 Vdc/60 μA @ 3.6 Vdc
SensorLow Power: Digital Magnetoresistive
Micropowered (-04 Option): Giant Magnetoresistance (GMR)
MaterialsHousingPowder-coated cast aluminum
Tubing/Fitting/Sensor HousingBrass, PVC, or 316 Stainless Steel
RotorPVDF (Kynar®)
ShaftKynar® /Tungsten Carbide (Kynar® /Ceramic or Kynar®/Silicon Carbide optional)
BearingsRuby jewel
O-Ring (15x/25x onlyEDPM
Valve Assembly for:IP11x/21x (Brass/SS)IP11x/21x (PVC)IP15x/25x (Brass/SS)IP15x/25x (PVC)
NoneNoneBronze (316SS optional)Uses gate valve
Fitting Size Required1.5” FNPT2” FNPT2” FNPT2” FNPT
MaximumPressureBrass/SS: 200 psi (14 bar)
PVC: 150 psi (10 bar)
TemperatureBrass/SS: 200˚ F (93˚ C)
PVC: 130˚ F (55˚ C)
Flow Velocity0.3 to 30 ft/sec (0.09 to 9.14 m/sec)
Accuracy± 1.5% of full scale
Output Transistor Maximum Current Sinking150mA (low power version only)
Cable#22 AWG 3-con, 18’ (6m); 2,000’ (610m) maximum cable run Note: 50’ (15m) maximum for battery-powered or
micropowered versions.
EnvironmentalSee meter mounted electronic specification for rating.
RegulatoryMark (applies to full power sensor only configuration and full power FT 430/440/450 mounted configurations)

Download Datasheet: Seametrics IP100/200 & IP150/250