Brand: Georg Fischer

GF Signet 8550-1 Flow Transmitter

Name: GF Signet 8550-1 Flow Transmitter – Datasheet & Price Quote
Brand: Georg Fischer

Description

Overview

The GF Signet 8550-1 flow transmitter is a rugged, single input/output signal converter engineered by GF Piping Systems to convert the frequency output of any GF Signet flow sensor into a stable, scalable 4–20 mA current loop signal. Designed for maximum configuration flexibility, the 8550-1 is available in field mount, integral pipe mount, or panel mount packaging, allowing plant engineers to standardize on a single transmitter platform across paddle wheel, magnetic, and ultrasonic flow sensor installations throughout a facility.

Working closely with plant engineers in the region, Seven Star LLC proudly supplies the GF Signet 8550-1 flow transmitter to water treatment plants, industrial process facilities, and utility operators across Oman and the wider GCC. Every unit shipped from our Muscat-based instrumentation division arrives with full manufacturer documentation, and our technical team supports sensor pairing, output scaling, and commissioning for clients throughout the Sultanate of Oman.

Operating Principle

The GF Signet 8550-1 accepts a frequency input signal from a compatible GF Signet flow sensor — paddle wheel, magmeter, or ultrasonic — and processes it through state-of-the-art digital electronics that scale the pulse frequency to an engineering unit of flow rate or total volume. The transmitter’s microprocessor continuously linearizes the incoming signal and outputs a proportional isolated 4–20 mA current loop, along with permanent and resettable totalizer counts displayed on a 2 x 16 character dot-matrix LCD. Because the signal conditioning is fully digital, the 8550-1 can be field-scaled to match virtually any flow range or engineering unit without recalibrating the sensor itself.

This architecture means the transmitter introduces no moving parts and no additional pressure drop into the process line, since all signal conditioning happens downstream of the sensor in a separate enclosure. The practical benefit for maintenance teams is that a failed transmitter can be swapped without disturbing the wetted sensor assembly, and a single spare 8550-1 can be pre-configured and held in inventory to minimize downtime across an entire plant’s flow monitoring network.

Engineering Design of the GF Signet 8550-1

The GF Signet 8550-1 is housed in a NEMA 4X-rated enclosure with a self-healing window that resists scratching and chemical exposure, making it suitable for outdoor installation in coastal and desert climates without an additional weatherproof housing. Large, tactile push buttons allow configuration even with gloved hands, and numbered terminals simplify wiring verification during commissioning or troubleshooting. The transmitter accepts a loop-powered 12 to 24 VDC supply and includes an output simulation mode for complete downstream system testing before the sensor is connected.

Two packaging options cover the full range of installation scenarios: the integral/pipe mount version couples directly to the sensor housing using the 8051 Integral Mount Kit for a compact single-point installation, while the panel mount version, installed using the 8050 Universal Mounting Kit, allows the transmitter to be positioned in a control panel or convenient wall location up to the maximum cable run distance from the sensor. Optional relay modules add process control outputs directly at the transmitter for simple pump or valve interlocks without a separate PLC.

Key Features

The GF Signet 8550-1 flow transmitter gives Omani water and process facilities a dependable, field-proven signal conversion platform:

Converts the frequency signal from any GF Signet flow sensor into an isolated, scalable 4–20 mA output for long-distance transmission.
Includes both permanent and resettable totalizers for accurate volumetric accounting and batch tracking.
Offers field mount, integral pipe mount, and panel mount packaging options to fit any installation layout.
Features a NEMA 4X enclosure with self-healing window for reliable outdoor and washdown-area operation.
Provides a 2 x 16 character dot-matrix LCD with large push buttons for straightforward field configuration.
Supports optional relays for direct process control such as pump protection or high/low flow alarms.
Includes an output simulation function for complete system testing without live flow present.
Scales to virtually any flow range or engineering unit, simplifying standardization across multi-sensor installations.

Industrial Applications

The GF Signet 8550-1 flow transmitter is widely used in flow control and monitoring for filtration and softener systems, effluent totalization, feed pump pulsing, and ratio control in chemical dosing skids. It is a common fixture in municipal and industrial water distribution networks, where its leak detection and totalizing capability support both regulatory reporting and operational efficiency, as well as in RO desalination trains and cooling tower makeup water systems common across Gulf process facilities.

With fast quotation turnaround and technical support, Seven Star LLC distributes the GF Signet 8550-1 to water treatment authorities, district cooling operators, and industrial plants across Muscat, the Sohar and Salalah economic zones, and the broader GCC region. We supply GF Signet hardware on request, supported by local application engineering.

Technical Specifications

Key specifications for the GF Signet 8550-1 flow transmitter are summarized below.

Parameter	Specification
Model	GF Signet 3-8550-1
Display	2 x 16 character alphanumeric LCD, 1 second update rate
Power supply	12 to 24 VDC ±10%, 61 mA max (loop powered)
Sensor input range	0.5 to 1500 Hz
Output	4 to 20 mA isolated, fully adjustable, 100 ms update rate
Output accuracy	±0.03 mA
Display accuracy	±0.5% of reading @ 25°C
Enclosure rating	NEMA 4X with self-healing window
Mounting options	Field/integral pipe mount, panel mount
Operating temperature	-10°C to 70°C
Compatible sensors	All GF Signet paddle wheel, magmeter, and ultrasonic flow sensors

Request a Quote for GF Signet 8550-1 Flow Transmitter

Seven Star LLC supports formal RFQ submissions, supplies on request, and provides full technical datasheets for the GF Signet 8550-1 flow transmitter on request. Contact our instrumentation division to confirm sensor compatibility and mounting configuration for your application. With engineering support in Muscat, Seven Star LLC is your local source for GF Signet flow instrumentation, with regional technical support.

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About brand

Georg Fischer, founded in 1802 and based in Schaffhausen, Switzerland, is known to plant engineers for piping systems and for the Signet line of flow and analytical instruments that fit into them. Seven Star LLC, an independent supplier in Oman, lists the GF Signet 3-2551 Magmeter insertion electromagnetic flow sensor and the GF Signet 8550-1 flow transmitter.

GF Signet instruments listed here

The 3-2551 Magmeter is an insertion flow sensor: it is mounted through a fitting in the pipe wall, has no moving parts and needs a liquid with some electrical conductivity. The 8550-1 is a flow transmitter that takes the signal from a Signet flow sensor and provides a display and outputs for the control system. Sensor, pipe fitting and transmitter are chosen together, because the fitting sets the insertion depth for a given pipe size and material.

Ordering GF Signet parts: what we need

Copy the manufacturer part number from the label, which normally starts with 3- followed by the model and option digits. Add pipe size, pipe material, the fitting you have, the fluid and its conductivity, sensor body material, output required and cable length. Water treatment, desalination and chemical dosing sites in the GCC often have older Signet transmitters; if a model is no longer produced we ask for the manufacturer's current replacement, which for the 8550 is listed by distributors as the Signet 9900.

Browse Georg Fischer products by category: Flowmeters.

Frequently Asked Questions

Which GF Signet flow sensors work with the 8550-1 transmitter?

The GF Signet 8550-1 accepts frequency input from any GF Signet paddle wheel, magmeter, or ultrasonic flow sensor, making it a universal signal conversion platform across a facility's flow monitoring points.

What mounting options are available for the 8550-1?

The 8550-1 is available as a field mount unit using the 8050 Universal Mounting Kit, an integral pipe mount unit using the 8051 Integral Mount Kit directly on the sensor, or a panel mount version for control panel installation.

Does the 8550-1 support totalization for batch or regulatory reporting?

Yes. The transmitter includes both permanent and resettable totalizers displayed on its LCD, supporting effluent totalization, batch tracking, and regulatory flow reporting without additional hardware.

Can the 8550-1 replace an older or discontinued GF Signet transmitter?

Yes. The 8550-1 shares the same sensor interface as legacy GF Signet transmitters, and its configurable output scaling allows it to serve as a drop-in replacement in most existing installations.

Is Seven Star LLC an experienced supply partner for Georg Fischer products?

Yes. Seven Star LLC supplies Georg Fischer products to customers in Oman and the GCC and can provide the manufacturer documentation and technical support on request.

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