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BARE WIRE * INSULATED * GROUNDED
* RADIATION SHIELD *
ASPIRATED
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For high and low temperature probing and measuring total temperature.
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United Sensor's Temperature/ Thermocouple Probes are used to measure total temperature
of air, gas, or liquids in Industrial, Aircraft/ Missile and special
purpose applications. These probes measure up to 2000°F in velocities
from 100 to 2000 ft/sec. A complete line of Exposed - Loop,
Insulated
Junction, Grounded Junction, Radiation Shielded, Stagnation Shielded and
Aspirated probes are available. All probes are primarily constructed
of stainless steel.
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Why
measure
the temperature of a flow?
In
order to determine the thermodynamic characteristics of a flow,
it is necessary to find the Total
Pressure (Pt), the Static Pressure (Ps)
and the Static Temperature (Ts). In practice, it is difficult to
measure the Static Temperature. To overcome this difficulty, it is common
to measure the Total
Temperature (Tt) and use adiabatic equations to determine
the Static Temperature: |
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Where k is the ratio of specific heats of the fluid.
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Temperature/ Thermocouple Probes
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TA, TAS:
For Zone 2 use; low temperature, gives
fast response; good in steep temperature
gradients. Also used in Zones 4, 5, and 6
for inexpensive
construction.
Standard diameters: 1/16", 1/8", 1/4"
TB, TBS:
For Zone 2 use; requires deeper immersion in gas to eliminate conduction. Good protection for thermocouples, basis
of completely pressure
tight assembly. Good in liquids. Also used in Zones 4, 5, and 6 for inexpensive construction and as
elements in multiple shielded
probes.
Standard diameters: 1/8", 1/4"
TU, TUS:
Same as TB, TBS, except junction is
grounded to tip of stem for fast
temperature response. TUS is made with
Mineral insulated cable
for bending<
installation.
Standard diameters: 1/16", 1/8", 1/4"
TC, TCS:
For Zone 3 use; Common in all types of compressors for efficiency measurements.
Standard
diameters: 1/8", 1/4"
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TD, TDS:
For Zones 2 and 3 use. Most accurate probe suitable for reference readings.
Bleed slot width made to suit velocity of application; thermocouple
wire is coiled.
Standard diameters: 1/8", 1/4"
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Ordering Information
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Typical Example: TBS-6-K-36-C-1-F
TBS: Type TBS
6:
a
= 6" - Probe length
K:
Type of thermocouple wire:
K
= Chromel - Alumel Thermocouple
J
= Iron - Constantan
T
= Copper - Constantan
E = Chromel - Constantan
36:
g
= 36" - Lead wire length. Plugs or Jack terminations
are available.
C:
d = 1/8" - Probe diameter
A
C
F
1/16"
1/8"
1/4"
1:
b
=
1" - Reinforcement tubing length
F:
m
= 1/4" - Reinforcement tubing diameter
F
J
5/16"
3/8"
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When
ordering TA, TB, TU, and TC Types
substitute TA, TB, TU, and TC for TAS, TBS, TUS, and TCS prefix in Part
number (and omit -1-J suffix in 1/4" OD models).
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Temperature/ Thermocouple Probes
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TE:
For high temperature medium velocity,
Zone 5. Wide shield spacing
minimizes
blocking due to carbon deposits.
Radiation Multi-Shielded
sensing head,
stainless steel stem for use in gases.
Standard
diameter: 3/8"
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TN:
Can be used in Zones 2, 3, 4, 5 and 6
because of silver coated element.
Only
useful if gas does not tarnish silver.
Element removable
for calibration and
polishing. Stagnation slotted external
shield with removable silver coated
thermocouple element for use in clean
gases.
Standard diameter: 1/4"
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TG:
High temperature, high velocity, Zone 6;
also Zone 5 where space limitations
are
important. Less likely to damage by liquid
fuel burning
on surface of probe when
used near burner because of separating
action of flow reversals through probe.
Pressure tight to 1000 psi.
Stagnation and Radiation slotted external shield,
thermocouple
insert made of mineral
insulated cable.
Standard diameter:
3/8"
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Ordering Information
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Typical Example: TG-8-K-36-W-J
TG: Type
TG
6:
a = 6" - Probe length
K:
Type of thermocouple wire:
K
= Chromel - Alumel Thermocouple
J
= Iron - Constantan
T
= Copper - Constantan
E = Chromel
- Constantan
36:
g = 36" - Lead wire length. Plugs or Jack terminations
are available.
W:
Welded - T/C tip joining compound
J:
d = 3/8"
- Probe diameter
J
F
3/8"
1/4"
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Temperature/ Thermocouple Probes
Aspirated Probes
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| United Sensor features a unique line of
Aspirated Temperature Probes for high
velocity and/ or high temperature use. The probes are designed
for use with an
aspirating pump and metering orifice to
draw measured
fluid past the hot junction
at a desired velocity (see figure below). |
velocities and temperatures below 500°F. External shield has an open tip.
Standard
diameter: 1/4"
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TJ:
Most versatile and accurate probes for all velocities and temperatures up to
2000°F. Requires bleed line for aspirating gas and source of suction if
rig pressure is less than 2" Hg. above atmospheric. Thermocouple element removable
for calibration. Completely pressure tight assembly. Suitable
for measuring reference temperatures. Radiation multi-shielded sensing head,
aspirated, with removable thermocouple element for use in all velocities.
Standard
diameter: 1"
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TL:
For Zones 1, 2, and 3 primarily; also
accurate in Zones 4, 5, and 6 because
of
low radiation loss from silver-coated
thermocouple; maximum
1600°F. Only
effective in gas that does not tarnish
silver.
Element removable for calibration
and polishing. External shield
has an open
tip.
TLI:
For Zones 1, 2, and 3; can also be used in
Zones 4, 5, and 6; maximum
2000°F.
Requires aspiration. Inconel covered
thermocouple is
removable. External shield
has an open tip.
TK:
For Zones 1, 2, and 3 primarily; can also be
used in 4, 5, and 6 where
space is limited.
Requires aspiration. Also useful for
measuring
fuel-vapor mixture temperature.
By pointing entrance downstream and
upward,
the flow reversal and aspirator
drain off liquid fuel thrown
onto shields and thermocouple reads true gas
temperature. Nichrome
shielded
thermocouple element for use in all |
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Ordering Information
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Typical Example: TL-8-K-36-F
TL: Type
TL
8:
a = 8" - Probe length
K:
Type of thermocouple wire:
K
= Chromel - Alumel Thermocouple
J
= Iron - Constantan
T
= Copper - Constantan
E = Chromel
- Constantan
36:
g = 36" - Lead wire length. Plugs or Jack terminations
are available.
F:
d = 1/4" - Probe diameter
F
1/4"
1"
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