Richards Thermocouple and Temperature Sensor Catalog 16

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Mullite Insulators - Maximum temperature of 2900°F (1590°C)
Inches Millimeters
Number Gauge Holes Length O.D.
Hole
Dia. Length O.D.
Hole
Dia. Construction
141-*
142-*
144-*
162-*
201-*
202-*
202-1/2
204-1
204-*
241-*
242-1/2
242-1
242-*
262-*
264-*
302-*
14
14
14
16
20
20
20
20
20
24
24
24
24
26
26
30
1
2
4
2
1
2
2
4
4
1
2
2
2
2
4
2
*
*
*
*
*
*
1/2
1
*
*
1/2
1
*
*
*
*
.250
.250
.335
.188
.188
.188
.188
.188
.188
.125
.125
.125
.125
.094
.094
.062
.125
.078
.098
.094
.060
.060
.060
.047
.047
.062
.040
.040
.040
.020
.020
.015
*
*
*
*
*
*
12.7
25.4
*
*
12.7
25.4
*
*
*
*
6.4
6.4
8.5
4.8
4.8
4.8
4.8
4.8
4.8
3.2
3.2
3.2
3.2
2.4
2.4
1.6
3.2
2.0
2.5
2.4
1.5
1.5
1.5
1.2
1.2
1.6
1.0
1.0
1.0
0.5
0.5
0.4
Four Hole Two Hole One Hole
Plain, full length
Collar, add “C” to part number
Alumina Insulators and Rods - 99% - Maximum temperature of 3450°F (1900°C)
Inches Millimeters
Number Gauge Holes Length O.D.
Hole
Dia. Length O.D.
Hole
Dia. Construction
141A-*
142A-*
144A-*
161A-*
201A-*
202A-*
202A-1/2
204A-1
204A-*
221A-*
222A-*
242A-1/2
242A-1
242A-*
244A-*
262A-*
264A-*
302A-*
14
14
14
16
20
20
20
20
20
22
22
24
24
24
24
26
26
30
1
2
4
1
1
2
2
4
4
1
2
2
2
2
2
2
4
2
*
*
*
*
*
*
1/2
1
*
*
*
1/2
1
*
*
*
*
*
.250
.250
.335
.188
.188
.188
.188
.188
.188
.156
.163
.125
.125
.125
.125
.094
.094
.062
.125
.078
.098
.094
.060
.060
.060
.047
.047
.090
.040
.040
.040
.040
.031
.020
.020
.015
*
*
*
*
*
*
12.7
25.4
*
*
*
12.7
25.4
*
*
*
*
*
6.4
6.4
8.5
4.8
4.8
4.8
4.8
4.8
4.8
4.0
4.1
3.2
3.2
3.2
3.2
2.4
2.4
1.6
3.2
2.0
2.5
2.4
1.5
1.5
1.5
1.2
1.2
2.3
1.0
1.0
1.0
1.0
.79
0.5
0.5
0.4
82A-*-O 8 2 * .45x.26 .156 * 11.4x6.6 4.0
Alumina Rods - Insulators without holes (may be used as spacers)
SA804 Solid Round 4” .500 0 101.6 12.7 0
SA803-O Solid Oval 3” .50x.28 0 76.2 12.7x7.1 0
Four Hole Two Hole One Hole
Collar, add “C” to part number
Plain, full length
Insulators and Rods - Alumina and Mullite
Manufacturing, Engineering and Sales Since 1938
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