Signet Instruments – Aqua Components

Signet 2850 Sensor Electronics

aqua@2025 — Thu, 13 Mar 2025 12:51:02 +0000

Signet 2850 Sensor Electronics provide a variety of implementations in order to guarantee the ideal flexibility during installation. There is a complete mounting version for tank, pipe, and well mounting, including single or dual options utilizing all kinds of conventional Signet resistivity and conductivity sensors, thereby requiring only one instrument for multple sensor types.

Models

Signet 2850 Sensor Electronics Specifications:

General
Compatible Electrodes	All Signet Sensors
Materials
NPT Mount Junction Box for Integral Mount	PBT
Universal/Remote Mount	PBT, CPVC
EasyCal – Automatic Recognition of the Following Conductivity Values
	146.93 µS, 1408.8 µS, 12856 µS (@25 °C) (Test solutions Per ASTM D1125-95)
	10 µS, 100 µS, 200 µS, 500 µS, 1000 µS, 5000 µS, 10,000 µS, 50,000 µS, 100,000 µS (@ 25 °C) (Standard test solutions)

Features

Test certificate supplied with all sensors
Custom cell constant programmed into the electronics
Integral mount systems for quick and easy installation
Compact design for maximum installation flexibility
Extends the disctance between the measuring point and the 9900 Transmitter to 120 m (400 ft)
Digital (S3L) interface or two-wire 4 to 20 mA output
EasyCal with automatic test solution
Dual channel unit available for low cost installation with Signet 8900 Multi-Parameter Controller
For use with ALL Signet conductivity electrodes

Applications

Water Treatment and Water Quality Monitoring
Reverse Osmosis
Deionization
Demineralization, Regeneration and Rinse
Scrubber
Cooling Tower and Boiler Protection
Aquatic Animal Life Support Systems

Docs

Signet 2850 Sensor Electronics Data Sheet

Signet 2350 Temperature Sensor

aqua@2025 — Thu, 13 Mar 2025 12:50:13 +0000

Signet 2350 Temperature Sensor deliver advanced features that are optimal for utilization in high water purity applications, and provide better instruments than metal sensors in vigorous liquids. Thermowells are not required when using these instruments which works in saving expenses. A compact assembly of field-operated mounting versions is achieved with integral adapter kits.

Models

Signet 2350 Temperature Sensor Specifications:

General
Output	Digital (S3 L) output or 4 to 20 mA
Accuracy	±0.5 °C (±0.9 °F)
Response Time, t	10 secs.
Repeatability	±0.1 °C (±0.2 °F)
Resolution	0.01 °C (0.02 °F)
Sensing-End Connection	¾ in. NPT male thread
Cable-End Connection	¾ in. NPT male thread

Features

Plating Bath Temperature Control
Heat Exchange Monitor
RO and DI System Monitor
Hot and Cold Mixing System Monitor
Data Acquisition
Cooling Loops
Effluent Monitoring
HVAC
Chemical Processing

Applications

4 to 20 mA output or digital (S3L) output
One-piece injection-molded SYGEF® PVDF body
PT1000 Platinum RTD in extended tip for quick response
Threaded for in-line or submersible installation
Standard ¾” in. NPT process connection

Docs

Signet 2350 Temperature Sensor Data Sheet

Signet 2450 Pressure Sensor

aqua@2025 — Thu, 13 Mar 2025 12:50:12 +0000

Signet 2450 Pressure Sensor include the appropriate features to meet your sensing requirements, including adding a temperature compensation function that enhances accuracy over different temperature ranges. Such instruments also address issues with corrosion under harsh conditions and chemical compatability.

Models

Signet 2450 Pressure Sensor Specifications:

General
Output	Digital (S3 L) or 4 to 20 mA
Accuracy
	For all pressure ranges	±1% of full scale @ 25 °C
	Response Time	< 100 ms
	Sensing-End Connection	½ in. union male thread (requires end connector and union nut)
Cable-end connection	¾ in. NPT male thread

Features

Test certificate included
4 to 20 mA output or digital (S3L) output
1/2 in. male union process connection
One-piece injection-molded PVDF body
Flush ceramic diaphragm
Easy installation
Choice of three pressure ranges
Pressure or level measurement

Applications

Level or Depth Sensing
HVAC
Scrubber Systems
Pump Protection
Water Management
Irrigation Systems
Wastewater
Chemical Processing
Pressure Regulation/Monitoring

Docs

Signet 2450 Pressure Sensor Data Sheet

Signet 2818-2823 Electrodes

aqua@2025 — Thu, 13 Mar 2025 12:50:10 +0000

Signet 2818-2823 Electrodes are designed for maximum verstaility during installation and precise sensing for an extremely great range. Materials are added to ensure other ideal features such as fantastic chemical compatibility and a surface finish to improve repeatability and accuracy.

Models

Signet 2818-2823 Electrodes Specifications:

General
Operating Range	3-2818, 3-2819		0.055 to 100 µS	18.2 MΩ to 10 KΩ	0.02 to 50 ppm
	3-2820		1 to 1000 µS	1 MΩ to 1 KΩ	0.5 to 500 ppm
	3-2821		10 to 10,000 µS	5 to 5,000 ppm
Cell Constant Accuracy	±2% of reading (certified cells ±1%)
Temperature Compensation Device				Pt1000
Cable Length (use for the 2818, 19, 20, 21, 22 and 23)	Standard	4.6 m (15 ft)
Cable Length (use for the 2818, 19, 20, 21, 22 and 23)	Maximum	30 m (100 ft) all sensors when used with 9900 or 9950 and Direct Conductivity/ Resistivity Module. 2818, 2819 maximum 4.6 m (15 ft) when used with 2850

Features

In-line or submersible mounting
NIST traceable certified cells ±1% meet USP requirements
Standard process connections ¾” NPT Polypro
Tri-clamp 1 -1 1/2″, 2″
¾ in. NPT SS on 10 and 20 cell
Optional 1/2″ NPT 316 SS
316 SS or Titanium standard electrode
Alternative electrode materials available
Hastelloy-C
Monel
Titanium

Applications

Pure Water Treatment: Reverse Osmosis, Deionization, Distillation
Boiler condensate
Semiconductor Water Production
Rinse Water Monitoring and Control
Chemical Concentrations
Cleaner and Degreaser Concentrations
TDS (total dissolved solids)
Salinity
USP Purified Water
WFI Water Production
Ultra Pure Water

Docs

Signet 2818-2823 Electrodes Data Sheet

Signet 2734-2736 pH/ORP Electrodes

aqua@2025 — Thu, 13 Mar 2025 12:50:09 +0000

Signet 2734-2736 pH/ORP Electrodes provides the perfect range for a great deal of harsh utilizations that conssit of minimal concentrations of chemicals and harmful ions reaction with silver minerals, Ag+. Chemical resistance is ensured through an advanced glass formulation when exposed to adverse environments. Long-life use, improved efficiency, protection against coating are other added features incorporated within these instruments.

Models

Signet 2734-2726 pH/ORP Electrodes Specifications:

General
Performance	Efficiency		>95% @ 25 °C (77 ° F)
Operating Range	pH		0 to 14 pH
	ORP		±2000 mV
	3-2734-HF, 3-2736-HF		Hydrofl uoric acid resistant glass, pH 6 or below; trace HF <2%
Compatability
	2751 pH/ORP Smart Sensor Electronics (for 8900, 9900, 9950 , Profi bus Concentrator, 4 to 20 mA)
Temperature Sensor
	Pt1000 versions	Compatible with Signet 2751 pH/ORP Smart Sensor Electronics for connection to a PLC or to the Signet 8900, 9900 or 9950 instruments and 0486 Profi bus Concentrator
Process Connection
	¾ in. NPT	ISO 7/1-R 3/4	Mounts into Signet fittings

Features

Enhanced reference chemistry to resist chemical poisoning and prolong the life of the electrodes in harsh environments
PTFE reference junction resists fouling and chemical attack
Superior pH glass formulation for excellent chemical resistance in acidic and alkaline/caustic environments
Ryton® (PPS) body for broad range of chemical compatibility
Memory chip enabled for access to a range of unique features when connected to the Signet 2751 pH/ORP Smart Sensor Electronics
Patented reference design for exceptional performance
Patented DryLoc® connector with gold plated contacts
Mounts in Signet standard fittings from DN15 to DN100 (½ to 4 in.) or standard pipe fitting, 3/4″ NPT or ISO 7/1-R 3/4
Special design allows for installation at any angle, even inverted or horizontal
Quick temperature response
Bulb and flat HF resistant glass available for trace HF, in less than 2% concentration applications

Applications

Wastewater Treatment
Reverse Osmosis
Deionization
Chemical Manufacturing/Addition
Metal and Plastic Finishing
Fume Scrubbers
Cooling Towers
Media Filtration
Chemical Dosing/Injection
Aquatic Life Support
Pools & Fountains
Rinse Tanks
Chemical Neutralization

Docs

Signet 2734-2736 pH/ORP Electrodes Data Sheet

Signet 2724-2726 pH/ORP Electrodes

aqua@2025 — Thu, 13 Mar 2025 12:50:08 +0000

Signet 2724-2726 pH/ORP Electrodes are multi-purpose sensor instruments that capable of being utilized across all sorts of applications. The advanced features incorporated in these products are fouling-resistant and are sure to elevate the overall efficiency and durability of the system. Resistance to corrosion under harsh environments further makes these instruments adaptable to specific utilizations that other related items could not operate in.

Models

Signet 2724-2726 pH/ORP Electrodes Specifications:

General
Performance	Efficiency		>97% @ 25 °C (77 ° F)
Operating Range	pH		0 to 14 pH
	ORP		±2000 mV
	3-2726-LC		Low conductivity fluids; 20 – 100 µS/cm nominal < 20 µS; flow must be less than 150 ml/min in a properly grounded system
	3-2724-HF, 3-2726-HF		Hydrofluoric acid resistant glass, pH 6 or below; trace HF <2%
Compatability
	2751 Smart Sensor Electronics (for 8900, 9900, 9950, 4 to 20 mA or Profi bus Concentrator), 2760 Preamplifier
Temperature Sensor
	Pt1000 versions	Compatible with Signet 2751 pH/ORP Smart Sensor Electronics for connection to a PLC or to the Signet 8900, 9900 or 9950 instruments
	3 KO Balco versions	Compatible with Signet 2751 pH/ORP Smart Sensor Electronics or with Signet 2760 pH/ORP Preamplifier for connection to the Signet 8750 pH/ORP Transmitter
Process Connection
	¾ in. NPT	ISO 7/1-R 3/4	Mounts into Signet fittings

Features

Patented reference design for exceptional performance and prolonged life in harsh environments Memory chip enabled for access to a wide range of unique features when connected to theSignet 2751 pH/ORP Smart Sensor Electronics
Ryton® (PPS) body for broad range of chemical compatibility
Patented DryLoc® connector with gold plated contacts
Special design allows for installation at any angle, even inverted or horizontal
¾” NPT or ISO 7/1-R 3/4 threaded sensors for use with reducing tees DN15 to DN100 (½ to 4 in.)
Mounts in Signet standard fittings from DN15 to DN100 (½ to 4 in.)
Quick temperature response
Bulb and flat HF resistant glass available for trace HF, in less than 2% concentration applications
Low conductivity sensor available for liquids down to 20 µS/cm

Applications

Water and Wastewater Treatment
Neutralization Systems
Scrubber Control
Effluent Monitoring
Sanitization Systems
Pool and Spa Control
Aquatic Animal Life Support Systems
Process Control
Cooling Towers

Docs

Signet 2724-2726 pH/ORP Electrodes Data Sheet

Signet 8150 Battery-Powered Transmitter

aqua@2025 — Thu, 13 Mar 2025 12:50:07 +0000

Signet 8150 Battery-Powered Transmitter incorporate cutting-edge features that ensures simple operations for a long duration. The software design is built with smart technology with a four-button keypard which can be utilized for convenience through the use of screen displays and system programming processes.

Models

Signet 8150 Battery-Powered Transmitter Specifications:

General
Compatibility	Signet 515 and 525 flow sensors
Input Freq. Range	0 to 400Hz
Accuracy	±0.5% of reading
Display	LCD Type
	4-digit upper line – flow rate
	8-digit lower line – volume totalizer count, either resettable or permanent
Averaging	0 to 120 secs.
Contrast	Automatic
Low Battery Indication	Battery symbol appears on LCD display
8-digit Resettable Totalizers	Stored until user resets; continues to be stored even after batteries are removed
8-digit Permanent	Kept permanently, even when batteries are removed

Features

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

Applications

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

Docs

Signet 8150 Battery-Powered Transmitter Data Sheet

Signet 9900 Transmitter

aqua@2025 — Thu, 13 Mar 2025 12:50:03 +0000

The Signet 9900 Transmitter offers advanced features for many different criterias that include temperature, salinity, pressure, flow, pH, level and other types of sensors. Transparency is improved as a result of a terrificly illuminated display that highlights the large characters and their values.

Models

Signet 9900 Transmitter Specifications:

General
Input Channels	One
Input Types	Digital (S3 L)	Serial ASCII, TTL level, 9600 bps
	Frequency	Range	0.5 to 1500 Hz
		Accuracy	0.5% of reading
Measurement Types		Flow, pH/ORP, Conductivity/Resis tivity, Salinity, Pressure, Temperature, Level, Dissolved Oxygen, Batch or user-defi ned (via 8058)

Features

Large auto-sensing backlit display with “at-a-glance” visibility
“Dial-type” digital bar graph
Intuitive and “user-friendly” interface consistent with legacy Signet ProPoint® and ProcessPro® devices
Optional Field upgradable relays
Selectable error mode for current outputs, 3.6mA or 22mA
4 to 20 mA input (with optional 8058 Signal Converter)
Warning LED indicator
Custom 13-character label capabilities for the channel type
Factory reset capability

Applications

Wastewater Treatment
Reverse Osmosis
Deionization
Chemical Manufacturing/Addition
Metal and Plastic Finishing
Fume Scrubbers
Cooling Towers
Media Filtration
Chemical Dosing/Injection
Aquatic Life Support
Pools & Fountains
Rinse Tanks
Chemical Neutralization

Docs

Signet 9900 Transmitter Data Sheet

Signet 8900 Multi-Parameter Transmitter

aqua@2025 — Thu, 13 Mar 2025 12:50:01 +0000

Signet 8900 Multi-Parameter Transmitter provides advanced designing that improves modularity to the fullest and utilizes field-commissioned integrations for users such as relays with easy to install modular screens, inputs and outputs. The instrument’s monitoring capabilities are simplified through a wide range of sensor options which include signet flow, temperature, pressure, conductivity, salinity, and dissovled oxygen.

Models

The Signet 8900 takes the concept of modularity to the extreme.

Two base-units, one with back-lit LCD and the other with Vacuum Fluorescent display can be configured in the field.
Ultimate flexibility is achieved via plug-in modules:
— Two, four or six input channels
— Universal AC line voltage or 12 to 24 VDC power
— Up to four analog outputs
— Up to four relays
The 8900 will support up to four additional relays, for a total of eight, by way of external relay modules.
Controller capabilities include Advanced Relay Logic, Derived Measurements, and much more!

Features

Measures Flow, pH, ORP, Conductivity, Pressure, Level, Temperature and Dissolved Oxygen
Multi-language display
1/4 DIN enclosure
Up to 4 analog outputs
Up to 8 relays
12 to 24 VDC or 100 to 240 VAC ±10%, regulated power
Digital communication allows for extended cable lengths and easy wiring
Accepts 3rd party 4 to 20 mA output devices when used with 8058 signal converter
Available with 2 to 6 channels
Simultaneous BTU Calculations with Heating & Cooling Totalizers per calculation

Applications

RO/DI System Control
Media Filtration
Pure Water Production
Demineralizers
Chemical Processing
Metal & Plastics Finishing
Fume scrubbers
Proportional Chemical Addition
Cooling Tower and Boiler Protection
Wastewater Treatment
Aquatic Animal Life Support Systems
Rinse Tank

Docs

Signet 8900 Multi-Parameter Transmitter Data Sheet

Signet 9950 Dual Channel Transmitter

aqua@2025 — Thu, 13 Mar 2025 12:49:58 +0000

Signet 9950 Dual Channel Transmitter is a highly simplified monitoring instrument that incorporates a variety of sensor options such as signet flow, pressure, salinity, level, temperature, conductivity, and dissolved oxygen. There are two separate readings which can be monitored by a conductivity module.

Models

Signet 9950 Dual Channel Transmitter Specifications:

Genera
Input Channels	Two frequency or S3 L inputs, or optional direct conductivity modules, maximum of 2 channels
Enclosure and Display 0 to 400Hz
Case Material	PBT
Window	Shatter-resistant glass
Keypad	4 buttons, injection-molded silicone rubber seal
Display	Dot matrix, LCD
Indicators	Two horizontal digital bar graphs, four LED relay status indicators
Update Rate	1 s
LCD Contrast	5 settings
Size	¼ DIN
Mounting
Panel	¼ DIN, ribbed on four sides for panel mounting clip inside panel, silicon gasket included
Wall	Wall Mount enclosure (sold as an accessory)

Features

Automatic pH glass impedance measurment
Selectable parameters for broken glass detection
Reads stored data in all Signt DryLoc® pH/ORP electrodes
One instrument for multiple sensor types
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
USB port for field upgrades using standard USB flash drives

Applications

Wastewater Treatment
Reverse Osmosis
Deionization
Chemical Manufacturing/Addition
Metal and Plastic Finishing
Fume Scrubbers
Cooling Towers
Media Filtration
Chemical Dosing/Injection
Aquatic Life Support
Pools & Fountains
Rinse Tanks
Chemical Neutralization

Docs

Signet 9950 Dual Channel Transmitter Data Sheet