Sanitary RTD

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RS style sanitary resistance temperature detectors are commonly used in the food and dairy industries. The sanitary fittings are welded to the stainless steel sheath and polished to meet 3-A Sanitary Council Standards. The highly polished finish prevents the growth of bacteria or other corrosive accumulation that might otherwise develop on standard RTD assembly connections.

There are various fitting sizes and styles available. Care must be taken to ensure that the correct fitting is specified. In addition to the sanitary fittings, typical RTD sanitary temperature sensor probes are equipped with an FDA compliant thermoplastic head, which has a gasket and is suitable for wash down applications. Various element types and wiring configurations are available.

RTD With Sanitary Fitting

The RSF style sanitary resistance temperature detector has a stainless steel cap, 316 stainless steel nipple, and a reduced tip.

Part Number Configuration - Example: RSF-HB-6D12D-T1W

RSW - Element Type + Wiring Configuration - Sheath Material + Sheath Diameter + Immersion Length "L" - Cap Type + Cap Size + Terminal Head

RTD With Sanitary Wells

The RSW style sanitary resistance temperature detector has a stainless steel cap and well.

Part Number Configuration - Example: RSW-ED-6H06H-T1W

RSW - Element Type + Wiring Configuration - Sheath Material + Sheath Diameter + Immersion Length "L" - Cap Type + Cap Size + Terminal Head

Sanitary RTD Specs & Options

Element Types

Element Type Code	Element Type Description
A	100 ohm Platinum, Class B .00385 Coefficient
B	100 ohm Platinum, Class A .00385 Coefficient
E	1000 ohm Platinum, Class B .00385 Coefficient
G	100 ohm Platinum, Class B .00392 Coefficient

Wiring Configurations

Wiring Configuration Code	Wiring Configuration Description
A	Single, 2 Wire
B	Single, 3 Wire (Minimum sheath diameter .156”)
C	Single, 4 Wire (Minimum sheath diameter .188”)
D	Dual, 4 Wire (Minimum sheath diameter .188”)
E	Dual, 6 Wire (Minimum sheath diameter .250”)

Sheath Material

Sheath Material Code	Sheath Material Description
6	316 Stainless Steel

Sheath Diameter

Sheath Diameter Code	Sheath Diameter Description	RTD Style
C	.188” or 3/16” O.D.	RSF
D	.250” or 1/4” O.D.	RSF
H	.500 or 1/2” Outer Diameter	RSW

Dimensional Chart

"L" Dimensions				"B" Dimensions				"A" Dimensions		Fractional Dimension
"L" Dimensions				"B" Dimensions				"A" Dimensions		Letter Code
“L” dimensions are specified in whole inches and a single alpha character which represents a fraction. Enter the three digit code as follows:				“B” dimensions are specified in fractions from ⅛” to 1”. Use the single alpha character to indicate the tip length. Enter the code as follows:				“A” dimensions are specified in whole inches only. Enter the three digit code as follows:		1/16"	A	11/16"	L
										1/8"	B	3/4"	M
										3/16"	C	13/16"	N
										1/4"	D	7/8"	P
										5/16"	E	15/16"	R
3"	030	10 5/8"	10K							3/8"	F	1"	S
4 1/2"	04H	12"	120	1/8"	B	5/8"	K	9"	009	7/16"	G	0	No
6 1/4"	06D	15 3/8"	15F	1/4"	D	3/4"	M	12"	012	1/2"	H
7 7/8"	07P	17 3/4"	17M	3/8"	F	7/8"	P	36"	036	9/16"	J
9 5/8"	09K	22 1/8"	22B	1/2"	H	1"	S	144"	144	5/8"	K

Cap Type

Sanitary Cap Type Code	Sanitary Cap Type Description
T	16A Plain Cap, Tri Clover
U	16A Plain Cap & 13H Hex Union Nut, Tri Clover

Cap Size

Sanitary Cap Size Code	Sanitary Cap Size Description
1	1 1/2” (Tube Outer Diameter)
2	2” (Tube Outer Diameter)
3	2 1/2” (Tube Outer Diameter)
4	3” (Tube Outer Diameter)

Terminal Head Options

Terminal Head Code	Terminal Head Description
A	Aluminum Screw Cover Head; 1/2” NPT Conduit Connection
W	White Polypropylene FDA Compliant Screw CoverHead; 1/2” NPT Conduit Connection

Custom Options Available - Contact us for Engineering Assistance.

Sanitary RTD Downloads

Spec Sheets - RTD Sanitary Fittings 0115-200KB
Resistance Temperature Detector Catalog 0115-2MB
Temperature Sensors Catalog 0115-4MB
Technical Data - RTD General Specifications 0115-250KB
Temperature Sensor Element Selection Guide 200KB