Page 1
D-9
Thermistors and Thermistor
Probe Assemblies
Precision-Interchangeable Series
To Order
(Specify Model Number)
Resistance
Dimensions and Description and Model (ohms)
Materials Typical Application Number @ 25°C
ON-901-44004 2,252
ON-901-44005 3,000
ON-901-44007 5,000
ON-901-44006 10,000
ON-901-44008 30,000
ON-909-44004 2,252
ON-909-44005 3,000
ON-909-44007 5,000
ON-909-44006 10,000
ON-909-44008 30,000
ON-905-44004
ON-906-44004
2,252
ON-905-44005
ON-906-44005
3,000
ON-905-44007
ON-906-44007
5,000
ON-905-44006
ON-906-44006
10,000
ON-905-44008
ON-906-44008
30,000
ON-910-44004 2,252
ON-910-44005 3,000
ON-910-44007 5,000
ON-910-44006 10,000
ON-910-44008 30,000
ON-920TA-44004
2,252
ON-920TA-44005
3,000
ON-920TA-44007
5,000
ON-920TA-44006
10,000
ON-920TA-44008
30,000
Vinyl Tip with Shielded-Jacketed
Microphone Cable.
Biological: Ideal for animal and biological
applications in esophageal or rectal temperature
measurement. It is also suitable for use in geographic
and oceanographic applications. Design
characteristics present an extremely rugged sensor
assembly at a minimum cost.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-901
$
36
All prices include sensor
Epoxy Encapsulated Thermistor Sensor in
Stainless Steel Housing with Vinyl Insulated Leads.
Surface temperature readings: or control and
indication. Ideally suited for applications such as: heat
loss or compressor efficiency measurement and control
studies of piping systems; determining manifold wall
and bearing surface temperatures. Construction
facilitates easy attachment to flat surfaces.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-909
$
48
All prices include sensor
Exposed Epoxy Coated Thermistor Sensor
mounted in Open-End Stainless Steel Housing
with Vinyl Shielded Jacketed Microphone Cable.
ON-906 has Economical Plastic Housing.
Air temperature measurement, control and indication:
design characteristics offer a perfect sensor assembly
for monitoring gas streams. Ideal for temperature
measurement and control of remote air readings.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-906
$
50
Body Type ON-905
$
55
All prices include sensor
Closed-End Stainless Steel Tube with Thermistor
Sensor Mounted in Tip. 1⁄8" NPT Fitting with Vinyl
Shielded-Jacketed Microphone Cable.
Liquid immersion sensor assembly: rugged
design and closed end construction. Ideally suited
for temperature measurement, control and
indication in fluids. Also for use in a wide variety of
pressurized systems applications.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-910
$
55
All prices include sensor
ON-901
ON-909
ON-905, ON-906
ON-910
VINYL SHIELDED-JACKETED
MICROPHONE CABLE
305 ±25
(12 ±1)
WHITE
VINYL
COAT
DIA.
MAX.
MAX.
25 ± 2
(
1 ±1/16)
13 ± 0.8
(1/2 ±1/32)
8
(5/16)
5 (3/16)
DIA.
VINYL
SHIELDED-JACKETED
MICROPHONE CABLE
STAINLESS STEEL
HOUSING 5.6 (0.220)
EPOXYCOATED
THERMISTOR
SENSOR
(6)
7
/
16
3
/
16
x
( ) SLOTS
EQUALLY SPACED
11 x 5
25 ±2
(
1 ±1/16)
13 ±0.8
(
1/2 ±1/32)
305 ±25
(
12 ±1)
16 ±0.4
(
5/8 ±1/64)
16 ±0.4
(
5/8 ±1/64)
6 ±1
(
1/4 ±1/32)
13 ±0.08
(
1/2 ±0.003)
HEX
5
/
32
( )
DIA. STAINLESS
STEEL CLOSED END TUBE,
THERMISTOR TEMPERATURE
SENSOR MOUNTED IN TIP
1
/
8
NPT
STAINLESS
STEEL FITTING
VINYL SHIELDED-JACKETED
MICROPHONE CABLE
POTTING
COMPOUND
4
11
(7/16)
114 ±2
(4-1/2 ±1/16)
305 ±25
(12 ±1)
14 ±2
(9/16 ±1/16)
25 ±2
(1 ±1/16)
13 ±1
(1/2 ±1/32)
THERMISTOR SENSOR &
EPOXY-ENCAPSULATED
CONNECTIONS
305 ±25
(12 ±1)
VINYL
INSULATED
CABLE
1
/
16
( )
1
/
8
( )
STAINLESS STEEL
HOUSING
1.6
3
NOM.
12.7 ±0.8
(1/2 ±1/32)
10 ±4
(3/8 ±.016)
mm (in)
mm (in)
mm (in)
mm (in)
MOST POPULAR
MODELS HIGHLIGHTED!
Closed-End Stainless Steel Tube with Thermistor
Sensor Mounted in Tip. 1⁄8" NPT Fitting with Vinyl
Shielded-Jacketed Cable.
Biological: tubular immersion sensor assembly
with detachable mating connector. Used in temperature
measurement and control of animal apparatus. Also
for use in closed vessels with pressurized systems
where detachable leads are desirable.
Leads:12"
Maximum temperature: 100°C
Body Type ON-920TA
$
83
All prices include sensor
ON-920TA
mm (in)
14.3 (9/16)
11.1
(7/16)
19.8
(25/32)
25.4
(1)
ø4.0
(5/32)
1/8 NPT
ø10.4 (41/100)
39.7
(1-9/16)
Vinyl Shielded-Jacketed
Microphone Cable
304.8 ±12.7
(12 ±1/2)
12.7
(1/2)
12.7 ±0.8
(1/2 ±1/32)
25.4 ±1.6
(1 ±1/16)
Page 2
D-10
D
Note: OMEGA’s precision interchangeable probes are normally constructed with ±0.2°C interchangeable thermistors. These are Types 44004,
44005, 44007, 44006 and 44008. If assemblies are required with ±0.1°C interchangeable probes, change the portion of the model number
designation to reflect the ±0.1°C thermistor.
Ordering Example: ON-901-44004 becomes ON-901-44033. Add $11 to the designated model price for ±0.1°C interchangeable thermistors.
Interchangeable thermistors with ±0.1°C interchangeability are Types 44033, 44030, 44034, 44031 and 44032.
To Order
(Specify Model Number)
Resistance
Dimensions and Description and Model (ohms)
Materials Typical Application Number @ 25°C
ON-930-44004 2,252
ON-930-44005 3,000
ON-930-44007 5,000
ON-930-44006 10,000
ON-930-44008 30,000
ON-940-44004 2,252
ON-940-44005 3,000
ON-940-44007 5,000
ON-940-44006 10,000
ON-940-44008 30,000
ON-950-44004 2,252
ON-950-44005 3,000
ON-950-44007 5,000
ON-950-44006 10,000
ON-950-44008 30,000
ON-960-44004 2,252
ON-960-44005 3,000
ON-960-44007 5,000
ON-960-44006 10,000
ON-960-44008 30,000
ON-970-44004 2,252
ON-970-44005 3,000
ON-970-44007 5,000
ON-970-44006 10,000
ON-970-44008 30,000
Epoxy Encapsulated Thermistor Sensor in Screw
Mounted Aluminum Housing with PFA Insulated
Leads.
Surface sensor assembly: designed for a variety of
temperature measurement and control applications. It
represents a low cost, fast response unit and lends
itself to easy mounting on flat surfaces.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-930
$
44
All prices include sensor
Encapsulated Thermistor Sensor in Molded
Housing with PFA Insulated Leads.
Insertion sensor assembly: specifically designed
for high reliability, high volume, and low cost
applications where fast time response and small
size are determining factors. The unit is easily
affixed by inserting in a small hole for mounting.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-940
$
42
All prices include sensor
Stainless Steel Housing with 1⁄4" Hex. Head and
#8-32 NC-2A Threaded Body. Thermistor Sensor
Epoxy Encapsulated in Housing with PFA
Insulated Leads.
Surface sensor assembly: for temperature
measurement and control where design problems require
stability against vibration and shock. The unit has been
designed for temperature control and measurement
problems where low cost and reliability are crucial.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-950
$
43
All prices include sensor
Closed-End Stainless Steel Tube with Thermistor
Sensor Mounted in Tip. Stainless Steel Mounting
Plate with (2) Two Mounting Holes Welded to
Tube. PFA Insulated Leads.
Air flow sensor assembly: designed to satisfy the
many requirements of air temperature-measurement
and control in Air Conditioning systems and
equipment cooling systems. The unit lends itself
to easy mounting to standard metal ducting.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-960
$
44
All prices include sensor
Stainless Steel Housing with 7⁄16" Hex. Head and
1⁄8-#27 NPT Threaded Body. Thermistor Sensor
Epoxy Encapsulated in Housing with PFA
Insulated Leads.
Liquid immersion fluid sensor assembly: ideal
for obtaining temperature measurement and control
readings in pipes or closed vessels within pressurized
systems. Threaded hex. head design affords greater
resistance to shock and vibration when mounted.
Leads 12" standard, other lengths available, consult factory.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Body Type ON-970
$
55 All prices include sensor
ON-960
ON-970
ON-950
ON-940
ON-930
5
/
16
( )
1
/
16
( )
3
/
16
( )
5
/
32
( )
1
/
2
( )
5
/
32
( )
305 25
(12 1)
4-SCREW MTG. HOLE
28 A.W.G.
INSULATED LEADS
ALUMINIUM
8
4
5
3
/
16
( )
5
4
1.6
13
305 ±25
(12 ±1)
1
/
4
1
/
32
±
( )
THERMISTOR
MOLDED HOUSING
28 A.W.G.
INSULATED LEADS
3.0
(.120) MAX
6 ±1
*8-32 UNC-2A
(.020 x 45
°)
CHAMFER
.5 x 45
°
305 ±25
(12 ±1)
28 A.W.G.
INSULATED
LEADS
1
/
4
( )
1
/
4
( )
4.3 ±.25
(.170 ±0.10)
.045
(1.1)
STAINLESS
STEEL
1
/
4
1
/
32
±
( )
6 ±1
6
6
28 A.W.G.
INSULATED LEADS
1 (.037)
1
1
/
2
1
/
16
±
( )
1
/
8
3
/
4
( )
DIA.
305 ± 25
(12 ±1)
CRIMP
STAINLESS
STEEL
PLASTIC TUBING
(2) #6-SCREW MTG. HOLES
25 ±.25
(1 ±.010)
( )
19
3.2
38 ±2
(2) 28 A.W.G.
INSULATED LEADS
305 ±25
(12 ±1)
9
/
16
( )
3
/
16
( )
7
/
16
( )
127
(5)
1
/
8
-27 N.P.T.
1
/
8
( ) DIA.
STAINLESS
STEEL
3.2
11
14.3
4.8
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
MOST POPULAR MODELS HIGHLIGHTED!
Page 3
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