Paddle Wheel Products

Paddle Wheel Flow Meters available at

The Signet 2537 Flow Sensor is the next generation in fluid measurement technology from the inventor of the original paddlewheel flowmeter. This sensor is an enhancement on what is already an industry standard. It has the added functionality of various output options including flow switch, pulse divider, digital (S3L) or 4 to 20 mA. Additionally, it offers low flow, low power and high resolution and can be configured on-site directly through the built-in user interface.

  • Digital (S3L) and 4 to 20 mA outputs (Multi-function)
  • Low flow capabilities down to 0.1 m/s (0.3 ft/s)
  • Polypropylene or PVDF sensor bodies
  • Polypropylene or PVDF retaining nuts
  • Installs into pipe sizes DN15 to DN200 (½ to 8 in.)
  • Test certificate included for -X0, -X1
  • Low power and high resolution options

Fields of Application:

  • Process Flow Monitoring
  • Pump Protection
  • Pure Water Production
  • Filtration Systems
  • Chemical Production
  • Reverse Osmosis
  • Demineralization/Regeneration
  • Fume Scrubbers
  • Cooling Towers
Price: Starting at $604.80
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The Signet 8150 Battery Operated Flow Totalizer is compatible with the Signet 515 and 525 flow sensors, and will provide years of dependable operation. The large digital display indicates flow rate and totalized flow volume simultaneously. One of the three totalizers is resettable from the front panel or a remote location, while the second resettable totalizer can only be reset by entering a user-selectable security code. Meanwhile, the third is a permanent non-resettable totalizer.

  • Three totalizers: 2 resettable and 1 permanent, user-selectable
  • Long-lasting lithium batteries
  • Mounting versatility
  • No-flow indicator
  • Large digital display with averaging
  • Simple push-button operation
  • User-selectable access code prevents unwanted changes
  • Auto-calibration

Fields of Application:

  • Wastewater Flow Accumulation
  • Water Treatment Systems
  • Remote or Mobile Treatment/Distribution Systems
  • Irrigation Systems
  • Filtration Systems
  • Commercial Pools and Spas
  • Groundwater Remediation
  • RO concentrate
  • Process flow monitoring



Price: Starting at $1,001.70
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Simple to install with time-honored reliable performance, Signet Model 515 Rotor-X Paddlewheel Flow Sensors are highly repeatable, rugged sensors that offer exceptional value with little or no maintenance. The output signal of the Model 515 is a sinusoidal frequency capable of driving a self-powered flowmeter (Model 5090). The wide dynamic flow range of 0.3 to 6 m/s (1 to 20 ft/s) allows the sensor to measure liquid flow rates in full pipes and can be used in low pressure systems.

The Signet Model 515 sensors are offered in a variety of materials for a wide range of pipe sizes and insertion configurations. The many material choices, including PP and PVDF, make this model highly versatile and chemically-compatible to many liquid process solutions. Sensors can be installed in up to DN900 (36 in.) pipes using Signet's comprehensive line of custom fittings. These custom fittings, which include tees, saddles, and weldolets, set the sensor to the proper insertion depth into the process flow. The sensors are also offered in configurations for wet-tap requirements.

  • Operating range 0.3 to 6 m/s (1 to 20 ft/s)
  • Wide turndown ratio of 20:1
  • Highly repeatable output
  • Simple, economical design
  • Installs into pipe sizes DN15 to DN200 (½ to 8 in.)
  • Self-powered/no external power required
  • Test certificate included for -X0, -X1
  • Chemically-resistant materials

Fields of Application:

  • Pure Water Production
  • Filtration Systems
  • Chemical Production
  • Liquid Delivery Systems
  • Pump Protection
  • Scrubber Systems
  • Water Monitoring
  • Not suitable for gases


Price: Starting at $316.80
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The GF Signet 9900 Transmitter provides a single channel interface for many different parameters including Flow, pH/ORP, Conductivity/Resistivity, Salinity, Pressure, Temperature, Level and other sensors that output a 4 to 20 mA signal. The extra large (3.90" x 3.90") auto-sensing backlit display features "at-a-glance" visibility that can be viewed at 4-5 times the distance over traditional transmitters. The highly illuminated display and large characters reduce the risk of misreading or misinterpreting the displayed values. The display shows separate lines for units, main and secondary measurements as well as a "dial-type" digital bar graph.
The 9900 is offered in both panel or field mount versions. Both configurations can run on 12 to 32 VDC power (24 VDC nominal). The 9900 can also be loop powered with compatible sensors.
Designed for complete flexibility, plug-in modules allow the unit to easily adapt to meet changing customer needs. Optional modules include Relay, Direct Conductivity/Resistivity, H COMM and a PC COMM configuration tool. The unit can be used with default values for quick and easy programming or can be customized with labeling, adjustable minimum and maximum dial settings, and unit and decimal measurement choices.

9900 Transmitter Applications:

  • Wastewater treatment
  • Reverse osmosis
  • Deionization (ultra pure water, two bed system, mixed bed system)
  • Chemical manufacturing / addition
  • Metal and plastic finishing
  • Fume scrubber
  • Cooling towers
  • Media filtration


Price: Starting at $573.30
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Kit includes:

  • Conduit base
  • Locking ring
  • Universal adapter
  • Mounts transmitter on a pipe, wall or other stationary surface
Price: Starting at $65.70

This is a required accessory for the 9900 field mount transmitter for integral mounting on GF Signet 515 Series sensors

Price: Starting at $76.50

Optional adapter for 8050 Universal and 8051 Integral mounts.

Price: Starting at $27.90

GF Signet installation fittings are designed to secure insertion style flow sensors into position and control the position of paddlewheels and electrodes in relation to the dimensions of the pipe. Use the proper fitting for your system to obtain the best results.

Metalex fittings are only for use with Metalex flow sensors.

Consult the fittings' datasheet to insure you select a fitting appropriate to the installation.

Price: Starting at $124.20
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Regulated output voltage in compact and lightweight plastic housings for DIN Rail mounting

  • Output capacities of 0.42A, 1A, 1.7A, 2.5A and 4A
  • Short circuit/overload/over voltage protection
  • Cooling by free air convection
  • Install on DIN rail TS-35/7.5 or 15
  • NEC class 2 / LPS compliant
  • Built in DC OK active signal
  • LED indicator for power on
  • No load power consumption
  • 100% full load burn-in test
Price: Starting at $109.80
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Manufactured by Georg Fischer / GF Signet

  • Connects with level, temperature, pressure and multiparameter instruments
  • Compatible with Signet instruments and other manufacturers' transmitters
  • Up to two 4 to 20mA sensor inputs
  • Connects additional measurement parameters to Signet 8900 Multi-Parameter instrument
  • Wire or DIN rail mountable
Price: Starting at $252.00
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The GF Signet H COMM Module enables communication between the 9900 transmitter and a HART®-enabled device. The HART (Highway Addressable Remote Transducer) Protocol superimposes digital signals on top of the 4 to 20 mA analog signal.
Allows communication between the 9900 Transmitter and a HART® enabled device
Allows access to primary and secondary measurements remotely
Allows user to remotely adjust the 4 and 20 mA settings

Price: Starting at $297.00

The GF Signet 9900 Relay Module adds two programmable dry-contact relays. The open collector output in the 9900 base unit uses the Relay 1 setting. The Relay Module is assigned to relays 2 and 3 in the menus.


  • Adds two programmable dry-contact relays
  • Available in panel mount only
  • Hysteresis and time delay available for each relay
  • User programmable
Price: Starting at $112.50
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