RTD's
Resistance Temperature Detector Applications
Platinum resistance to temperature detectors (RTD's) is used for
temperature measurements in the range of -328ºF to 1166ºF. The
electrical resistance of the platinum wire utilized is proportional to
temperature variation. This variation is precise and repeatable. The
electrical resistance in the RTD is measured by an indicating instrument
which converts the reading to a temperature.
RTD's provide electrical and mechanical stability with negligible
drift and error. Their design allows for easy installation in new or
existing equipment.
RTD's are excellent for use in detecting stator and winding
temperatures in large and medium motors, generators, and transformers.
Other typical applications include temperature measurements in pumps,
turbines, and compressors. RTD's are also used to measure temperatures
in processing equipment for chemicals, petroleum, power, food, plastics,
and solar energy.
Repeatability and stability are important characteristics of all
RTD's. Repeatability is +/- 18ºF over the full temperature range.
Stability tests after one year indicate drift to be only +/- 18ºF at
32ºF within the rated temperatures.
RTD Assemblies - Style AB Sheathed
Ordering Example:
AB-K-188-G-C-S3-21=
Type K Thermocouple, 3/16" O.D., grounded junction, Inconel
sheath, 3" strip length, 21" sheath length
ANSI
Calibration |
Sheath
Diameter |
Type of
Junction
(Hot End) |
Sheath
Material |
Strip
Length |
Sheath
Length |
| K = Chromel-Alumel* |
063 = 1/16" |
G = Grounded |
A = 304 SS |
Use the letter S |
"L" |
| J = Iron-Constantan |
125 = 1/8" |
U = Ungrounded |
B = 316 SS |
plus length in |
Dimension |
| T = Copper-Constantan |
188 = 3/16" |
E = Exposed |
C = Inconel 600 |
inches |
in inches |
| E = Chromel*-Constantan |
250 = 1/4" |
|
|
|
|
| N = Nicrosil-Nisil |
|
|
|
|
|
| RTD 100 |
|
|
|
|
|
RTD's available in 2 or 3 wire versions, spedify RTD 100-2 or
RTD 100-3.
Add suffix DX for duplex assemblies
* Tradename - Hoskins Mfg. Co.
RTD Assemblies - Style AC Sheathed
Ordering Example:
AC-K-188-G-C-P-12=
Type K Thermocouple, 3/16" O.D., grounded junction, Inconel
sheath, male plug, 12" long
ANSI
Calibration |
Sheath
Diameter |
Type of
Junction
(Hot End) |
Sheath
Material |
Type
of End |
Sheath
Length |
| K = Chromel-Alumel* |
063 = 1/16" |
G = Grounded |
A = 304 SS |
P = Plug |
"L" |
| I = Iron-Constantan |
125 = 1/8" |
U = Ungrounded |
B = 316 SS |
J = Jack |
Dimension |
| T = Cooper-Constantan |
188 = 3/16" |
E = Exposed |
C = Inconel 600 |
PJ = Plug and Jack |
in inches |
| E = Chormel*-Constantan |
250 = 1/4" |
|
|
HP = Hi-Temp Plug |
|
| N = Nicrosil-Nisil |
|
|
|
HJ = Hi-Temp Jack |
|
| R = Pt-Pt 13% Rh |
|
|
|
MP = Mini Plug |
|
| S = Pt-Pt 10% Rh |
|
|
|
MJ = Mini Jack |
|
| RTD 100 |
|
|
|
|
|
RTD's available in 2 or 3 wire versions, spedify RTD 100-2 or
RTD 100-3.
Add suffix DX for duplex assemblies
* Tradename - Hoskins Mfg. Co.
------------------------------------------------------------------------------------------------------
RTD Assemblies - Style AD Sheathed
Ordering Example:
AD-K-188-G-C-TF-12-72-0-SE-1=
Type K Thermocouple, 3/16" O.D., grounded junction,
Inconel sheath, transition fitting, 12" long sheath, 72" long
lead wire, no armor, stripped ends, with 20 Ga. PVC extension
wire
ANSI
Calibration |
Sheath
Diameter |
Type of
Junction
(Hot End) |
Sheath
Material |
(Cold End) |
| K = Chromel-Alumel* |
063 = 1/16" |
G = Grounded |
A = 304 SS |
TF = |
| J = Iron-Constantan |
125 = 1/8" |
U = Ungrounded |
B = 316 SS |
Transition |
| T = Copper-Constantan |
188 = 3/16" |
|
C = Inconel 600 |
Fitting |
| E = Chromel*-Constantan |
250 = 1/4" |
|
|
|
| N = Nicrosil-Nisil |
|
|
|
|
| RTD 100 |
|
|
|
|
Sheath
Length |
Lead Wire
Length |
Flexible
Armor |
Plug, Jack,
Both
or Spade Lugs |
Type of
Extension Wire |
| "L" |
"E" |
0 = No Armor |
P = Plug |
1 = 20 Ga. PVC |
| Dimension |
Dimension |
1 = 9/32" O.D., |
J = Jack |
2 = 20 Ga. G/G |
| in inches |
in inches |
SS Armor |
PJ = Plug & Jack |
3 = 24 Ga. G/G |
| |
|
|
SL = Spade Lug |
4 = 20 Ga. T/T |
| |
|
|
SE = Stripped Ends |
|
RTD's available in 2 or 3 wire versions, spedify RTD 100-2 or
RTD 100-3.
Add suffix DX for duplex assemblies
Other extension wires are available, contact our sales office
* Tradename - Hoskins Mfg. Co.
RTD Assemblies - Style AR Sheathed
Ordering Example:
AR-J-188-G-A-SC1212-12=
Type J Thermocouple, 3/16" O.D., grounded junction, 304
stainless steel sheath, screw cover head with 1/2" x 1/2" hex
pipe bushing brazed to the sheath, 12" long
ANSI
Calibration |
Sheath
Diameter |
Type of
Junction
(Hot End) |
Sheath
Material |
Type of Head
&
Mounting Thread |
Sheath
Length |
| K = Chromel-Alumel* |
063 = 1/16" |
G = Grounded |
A = 304 SS |
SC = Screw Cover Head |
"L" |
| J = Iron-Constantan |
125 = 1/8" |
U = Ungrounded |
B = 316 SS |
PH = Plastic Head |
Dimension |
| T = Copper-Constantan |
188 = 3/16" |
|
C = Inconel 600 |
MPH = Mini Plastic Head |
in inches |
| E = Chromel*-Constantan |
250 = 1/4" |
|
|
XP = Explosion Proof
Head |
|
| N = Nicrosil-Nisil |
|
|
|
1212 = 1/2" x 1/2" Hex
pipe |
|
| RTD 100 |
|
|
|
bushing brazed to sheath |
|
RTD's available in 2 or 3 wire versions, spedify RTD 100-2 or
RTD 100-3.
Add suffix DX for duplex assemblies
Industronics Service Company is one of the leading suppliers
of Thermocouples and RTD's in North America.
Our reputation has been built on high quality, fast delivery
, and reliability.
