Georg Fischer 2756-WT Specifications
Signet 2756-2757 pH/ORP Wet-Tap Electrodes
Features
• PTFE reference junction resists fouling and
chemical attack
• Polyarylsulphone (PAS) body for broad range of
chemical compatibility
• General purpose bulb pH glass suitable in a wide
range of applications
• Patented DryLoc connector with gold plated
contacts
• Pt1000 or 3 KOhm Balco temperature element for
quick temperature response
• Electrode removal without process shutdown
when installed in the Signet 3719 pH/ORP Wet-Tap
Assembly
The Signet 2756-2757 Wet-Tap pH and ORP electrodes
are general purpose sensors ideal for a wide range of
applications where the installation and removal of the
electrode can be performed without the need for system
shutdown.
The Signet 3719 pH/ORP Wet-Tap Assembly allows
installation and removal of pH or ORP electrodes, even
under process pressure, without the need for process
shutdown during routine electrode maintenance and
calibration. Process isolation is achieved during
electrode retraction with two sets of double O-ring seals
on a unique and compact retraction assembly;
no separate valve is required.
The DryLoc connector with corrosion resistant gold
plated contacts readily connects the sensor to the
mating 2751 pH/ORP Smart Sensor Electronics or the
2760 Preamplifi er. The robust polyarylsulphone (PAS)
body and choice of bulb pH or fl at ORP sensing elements
allow a broad range of chemical compatibility for a wide
range of applications.
• Memory chip enabled for access to a wide range
of unique features when connected to the Signet
2751 pH/ORP Smart Sensor Electronics
• Special design allows for installation at any angle,
even inverted or horizontal
Applications
• Aquatic Animal Life Support Systems
• Recreational Water Monitoring
• Water & Wastewater Treatment
• E uent Monitoring
• Neutralization Systems
• Sanitization Systems
• Pool and Spa Control
The quick temperature response is available in either
a Pt1000 or 3 KΩ temperature sensor and allows
compatibility with all Signet pH/ORP instruments.
The Wet-Tap assembly unit can be mounted at any angle
and can be used with the Signet DryLoc® Wet-Tap pH and
ORP electrodes.
Specifi cations
Customer supplied tees and fittings
All sold separately
4 to 20 mA InputPanel Mount
System Overview
Wet-Tap Installation
PLC
2751 Smart Sensor Electronics
and Customer Supplied Chart Recorder,
Programmable Logic Controller, or
Programmable Automation Controller
+
+
Signet Instrument
8900 9900 9950
with 2751 Smart Sensor Electronics
ENTER
OR
Pipe, Tank, Wall Mount
Signet Instruments
9900 with 2751 Smart Sensor
Electronics and Rear Enclosure
+
Automation System
2751 Smart Sensor Electronics with 0486
Profibus Concentrator
and Customer Supplied
Programmable Logic Controller or
Programmable Automation Controller
USB
Address
Signet 3-0486 Profibus Concentrator
S3L Freq
Channel 1
S3L Freq
Channel 2
S3L Freq
Channel 3
S3L Freq
Channel 4
S3L Loop
Channel 5
S3L Loop
Channel 6
Channel 7
Valve
In
Out
L IN+
L IN-
N/C
L OUT+
L OUT-
N/C
L IN+
L IN-
+5V OUT
DATA
GND
L IN+
L IN-
+5V OUT
DATA
GND
GND
DATA
Freq IN
+5V OUT
GND
DATA
Freq IN
+5V OUT
GND
DATA
Freq IN
+5V OUT
GND
DATA
Freq IN
+5V OUT
PWR-
PWR-
PWR-
PWR+
PWR+
PWR+
Profibus
Power
24 VDC
0.40A Max
PLC
+
+
Signet Model Wet-Tap Electrode 3-2756-WTP,
3-2756-WTP-1 or 3-2757-WTP
with 3719 Wet-Tap Assembly
General
Compatibility Signet 3719 Wet-Tap Assembly, 2751 Smart Sensor Electronics or 2760 Preamplifi er
Operating Range pH 0 to 14 pH
ORP ±1500 mV
Connector CPVC DryLoc
Temperature Sensor (pH) Pt1000 or 3K Balco for pH
Reference Junctions Porous PTFE
Electrolyte Saturated KCl
Elements Ag/AgCl
Response Time
pH < 5s for 95% of signal change
ORP Application dependent
Impedance (pH) < 150 MΩ @ 25 °C
Wetted Materials
Body PAS (Polyarylsulphone)
Reference Junction Porous PTFE
Sensing Surface pH Glass membrane
ORP Platinum
O-rings FKM
Connector CPVC
Max. Temperature Rating
Operating Temperature 0 °C to 85 °C 32 °F to 185 °F
Recommended Storage Temperature
0 °C to 50 °C 32 °F to 122 °F
The electrode glass will shatter if shipped or stored at temperature below 0 °C (32 °F)
The performance life of the electrode will shorten if stored at temperatures above 50 °C (122 °F)
Mounting
Any angle is acceptable. Use with 3719 Wet-Tap assembly for mounting electrodes.
Shipping Weight
0.2 kg 0.4 lb
Standards and Approvals
Manufactured under ISO 9001 for Quality
www.gfsignet.com
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