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Sanitary RTD Assemblies
Spring Loaded Design with
Sanitary Thermowell
3
⁄4 NPT conduit
connection.
PRS-TW-NB9W Series
U Removable Spring Loaded Probe in
Well for Good Thermal Response
1
U 1
⁄2" 16 AMP Tri-Grip™ (Tri-Clamp®
Compatible) Fitting
U Standard Insertion Lengths of
15⁄8, 21⁄2, 41⁄2, 71⁄2, 101⁄2"
U White Polypropylene Head with
Screw Cap Standard, Other
Polypropylene and SS Heads
Available
U 316L SS Thermowell with 32 µin
or Better Finish on Wetted Parts
U 4-Wire Pt100 Class A
Element Standard
U -50 to 200°C (-58 to 392°F)
Temperature Range
Options
U Fitting Styles
U RTD Elements
U Protection Heads
The OMEGA® PRS-TW-NB9W series RTD probes are
spring loaded into a sanitary thermowell, with a 1⁄2 x 1⁄2
NPT fitting for easy removal. These probes feature a
4-wire Pt100 Class A element (100 ±0.06 Ω at 0°C) that is
compatible with 3-wire RTD instrumentation.
Allows Sensor
Removal/Calibration
Without Disturbing
Your Clean-In-Place
System
Sensor Flange Size
3
to 4" Tri-Grip
4
⁄
Range
Process Flange.
Visit us Online for
Details.
spring loads sensor
Connection
Head Style Sensors
TM
Visit us Online
for Head Mounted
Transmitter
Options
White
polypropylene
screw cover
connection head.
1
⁄2 x 1⁄2 NPT fitting
in thermowell.
316L SS 1
16 AMP
Tri-GripTM
cap standard.
1
⁄2"
32 µin Finish
Insertion
length
PRS-3-100-A-TW-0250-D1-NB9W,
shown smaller than actual size.
Please consult sales for available options, including
element types and curves, probe lengths, protection
heads and sanitary fitting styles.
Standard well features include a 0.5" dia. stem
(0.75" stepped down for insertion lengths over 2.5") with
a 0.260" bore diameter. See the S-260 series thermowells
online for complete well dimensions.
To Order
Lead Wire Well Stem Insertion Shank
Model No. Style Ω at 0°C Length Length Diameter
PRS-3-100-A-TW-0163-D1-NB9W 4-wire 100 2
1
" 1
⁄
2
PRS-3-100-A-TW-0250-D1-NB9W 4-wire 100 4" 2
PRS-3-100-A-TW-0450-D1-NB9W 4-wire 100 6" 4
PRS-3-100-A-TW-0750-D1-NB9W 4-wire 100 9" 7
PRS-3-100-A-TW-1050-D1-NB9W 4-wire 100 12" 10
Optional protection heads: To order with NB16W white polypropylene flip-top head, change model number suffix from “-NB9W” to “-NB16W”
for an additional cost.
To order with NB15 large 316 SS head, change model number suffix from “-NB9W” to “-NB15” for an additional cost.
To order with NB13 medium size 316 SS head, change model number suffix from “-NB9W” to “-NB13” for an additional cost.
Note: Please consult sales for available options, including element types and curves, probe lengths, and sanitary fitting styles.
Ordering Examples: PRS-3-100-A-TW-0450-D1-NB9W, 4-wire Pt100 RTD sensor (100 Ω @ 0°C, Class A accuracy), spring loaded in a 1
16 AMP fitting thermowell with 6" stem length/4
PRS-3-100-A-TW-0750-D1-NB9W, 4-wire Pt100 RTD sensor (100 Ω @ 0°C, Class A accuracy), spring loaded in a 1
thermowell with 9" stem length/7
1
⁄2" insertion length.
1
" insertion length.
⁄
2
C-25
5
"
⁄
8
1
"
⁄
2
1
⁄
1
⁄
1
1
3
"
2
2
⁄
⁄
2
⁄
4
3
"
⁄
4
3
"
⁄
2
" 16 AMP fitting
4
1
"
⁄
2
1
"
⁄
2
" step to
" step to
" step to
1
"
⁄
2
1
"
⁄
2
1
"
⁄
2
1
⁄2"
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