3
Signet 3719 pH/ORP Wet-Tap
Notes on Location, Orientation and Required Clearance
•
The 3719-1X is designed for use in pipes up to 4 in.
•
The 3719-2X is designed for use in pipes from 6 to 12 in.
•
Select a location that will provide suffi cient clearance to
remove and insert the electrode.
•
The 3719 can be mounted in any orientation, including
horizontal and inverted. Avoid the 12 o'clock position. In the
presence of sediment, avoid the 6 o'clock position. See next
page for dimensional information.
•
If inverted, use caution when
removing the sensor.
Residual fl uid may be
present in the retraction
housing. Keep electrode
connector clean and dry at
all times.
Any angle OK
a
b
c
e
d
a) 3719 pH/ORP Wet-Tap
b) Customer-supplied Low-Profi le Clamp-on Saddle Fitting
(ASTM sizes 2½ to 12 in.)
c) DryLoc
®
pH or ORP Electrode (6 versions available; see
ordering information on page 8.)
(DryLoc
®
refers to the electrode connector style)
d) 3-2751-1 or 2760 DryLoc
®
pH/ORP Sensor Electronics/
Preamplifi er
e) 3-2751-2 electronics
NOTE: Output signal options (See specifi c manual for details):
2751:
- Digital (S
3
L)
- 4 to 20 mA
2760:
- Analog mV Output- Digital (S
3
L)
All components (items a–d) are sold separately.
General
Compatible sensors (See 3-2764.090 for more information):
2756 -WTP DryLoc plastic pH electrode
2756-WTP-1 DryLoc plastic pH electrode
2757-WTP DryLoc plastic ORP electrode
Shipping Weight
Wet-Tap assembly ............ 1.2 kg (2.7 lbs.)
Electrode ........................... 0.13 kg (0.3 lb)
Process Connection ............. 3-3719-11: 1½ in. NPT
3-3719-21: 2 in. NPT
3-3719-12: ISO 7/1-R1½
3-3719-22: ISO 7/1-R2
Wetted materials
Retraction Housing ............... CPVC
O-rings .................................. FKM
Other Materials
Locking Shroud..................... PVC
Hardware .............................. 316 stainless steel
Storage Temperature
Wet-Tap assembly ............ -15 to 120 °C (5 to 248 °F)
Standards and Approvals
Manufactured under ISO 9001 and 14001
China RoHS (Go to www.gfsignet.com for details)
25
Specifi cations
System Overview
Installation
