9950 Dual Channel Transmitter



  • One instrument multiple sensors
  • Configurable display
  • USB Port for Field Upgrades

9950 Dual Channel Transmitter

The 9950 Dual Channel Transmitter is a two-channel controller that supports two sensors of same or different types in one instrument.

​The sensor types supported by the 9950 are Signet Flow, pH/ORP, Conductivity/Resistivity, Salinity, Temperature, Pressure, Level, Dissolved Oxygen, and devices that transmit a 4 to 20 mA signal with the use of the 8058 iGo® Signal Converter.

The 9950 includes advanced features such as derived functions, advanced multiple relay modes, and timer-based relay functions. Derived functions allows for the control of a relay or current loop with the sum, delta (difference), or ratio of two measurements, for example delta pressure and delta temperature. Multiple relay modes allow up to three signals to be used for the control of a single relay. This can be any combination of analogue and binary inputs. The timer relay modes allow a relay to be activated on a repeating basis from every minute to once every 30 days. Weekday timer mode allows a relay to be energised on a specific day or days of the week at a specific time.

The 3-9950.393-3 Relay Module includes the ability to interface up to four binary inputs. The binary inputs are compatible with either open collector or mechanical contacts. The binary inputs can supply power to the four inputs or accepts powered outputs from external devices. These inputs can be used with level switches, flow switches, pressure switches or other devices. The inputs can be used to directly control the relays of the 9950 or can be used in combination with the measurement readings for advanced control of your process.

The 9950 supports the following relay modules:

  • Four Channel Mechanical Relay Module
  • Two Mechanical and Two Solid State Relay Module
  • Two Mechanical Relays and Four Binary Inputs Module

Features of the 9950 Dual Channel Transmitter include:

  • ​One instrument for multiple sensor types
  • Multiple language support for (Gen 2a) or later in Simplified Chinese, English, French, German, and Spanish
  • Two different sensor types can be combined in one instrument.
  • Configurable display
  • Derived measurements
  • Advanced Boolean logic
  • Optional modules can be added for additional capabilities.
  • Two, passive, 4 to 20 mA current loop outputs in base unit
  • USB Port for Field Upgrades using standard USB Flash Drive


  • Wastewater Treatment
  • Reverse Osmosis
  • Deionization
  • Chemical Manufacturing / Addition
  • Metal and Plastic Finishing
  • Fume Scrubber
  • Cooling Tower
  • Media Filtration
  • Chemical Dosing/ Injection
  • Aquatic Life Support
  • Pools & Fountains
  • Rinse Tanks
  • Chemical Neutralisation

Ordering More Than Five?: If your organisation requires five or more 9950 units, please contact our team of experts for a quotation.


Manufacturer: GF Signet

Liquid: Chemical, Clean Water

Media Type: Liquids

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Product Specification

he 9950 Dual Channel Transmitter is a two-channel controller that supports two sensors of same or different types in one instrument.

Specification Detail of the 9950 Dual Channel Transmitter:


Input Channels

Two frequency or S3L inputs

Input Types

Digital (S3L): Serial ASCII, TTL Level, 9600 bps;

Frequency Range – 0.5 to 1500Hz,

Accuracy – 0.5% of reading


Case: PBT

Window: shatter resistant glass

Keypad: 4 buttons, injection moulded silicon rubber seal

Display: Dot matrix, LCD

Operating Temp Range

-10° to 70°C

Current Loop Out

ANSI-ISA 50.00.01 Class H (Passive, external voltage required)

Relay Specifications

Dry-Contact /Solid-state relays

Enclosure Rating

Designed to meet NEMA 4X/IP65 (front face only)


24 VDC nominal (12 to 32 VDC, ±10% regulated), UL 60950-1 or UL 61010-1 Power Supply rated for operation at 4000 m altitude.


CE, UL, CUL, FCC, RoHS compliant, China RoHS

Manufactured under ISO 9001 and ISO 14001 for Environmental Management

and OHSAS 18001 for Occupational Health and Safety


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