
D-16
Thermistor Probes
Series 700
Linear
Series 700 Linear Response probe assemblies are fitted with precision 44018 linear
thermistor elements rated to 100°C (212°F). Each is supplied with 3 m (10') of vinyl
covered lead wire. A three (3) conductor phone plug is standard termination. To order
longer leads, place an “x” after the model number and specify length up to 76 m (250').
Additional lead lengths are available at $0.80 per 300 mm (12"). Please see Section M.
Thermistor Probes
For Use with Heavy
Duty HDX Handle
Laboratory
OL-701-PP General Purpose
Water resistant. Can be buried
for sub-soil readings.
OL-709-PP Attachable Surface
Temperature Stainless steel cup, epoxy
backed. Easy to tape on flat surfaces.
OL-705-PP Air Temperature Stainless
steel probe suitable for test rooms,
incubators, remote air readings.
OL-706-PP Same as the OL-705-PP,
but with an economical plastic housing.
OL-703-PP Tubular Stainless steel
probe for rugged duty. Often used for
liquid immersion. Immersible only to
transition fitting.
OL-710-PP Tubular with Fitting
Rugged stainless steel probe with
pipe fitting. Suitable for use in pipes
or closed vessels.
THX-700 probes are designed to work
with the heavy duty HDX handle. Each
probe has a 3-prong OTP-copper
connector termination and precision
44018 linear thermistor element, rated
up to 100°C (212°F), which will work
with all readout instruments designed
for Series 700 probes, please see
Sections L and M.
Quick Disconnect
The General Purpose Probe is for
general purpose gas and liquid
immersion measurements. Made from a
rugged 3.1 mm (
1
⁄8") O.D. 304 stainless
steel sheath, 300 mm (12") long, it will
adapt to most process applications.
The Penetration Probe easily pierces
soft and semi-frozen material as well as
soil and sand. Made from a rugged 3.1
mm (1⁄8") O.D. 304 stainless steel
sheath, 300 mm (12") long.
The Air Probe is for HVAC applications.
The small diameter sheath and radiation
hood easily fit into duct-work, grilles,
and vents. The probe will work with the
OMEGA
®
HDX handle or can be
permanently mounted using
OMEGALOK
®
compression fittings.
OL-701-PP*
OL-709-PP
OL-705-PP**
OL-703-PP
OL-710-PP
$
54
CUSTOM ASSEMBLIES AVAILABLE!
Series 700 probes are available with other elements for different ranges and in other lengths
and configurations. See Section I and contact Custom Engineering for a quotation.
THX-700-GP-12
$
70
Basic Unit
THX-700-NP-12
$
80
Basic Unit
Penetration Probe
THX-700-AP-12
$
90
Basic Unit
*Add suffix “-V” for vinyl tipped version
Phone Plug
Connector
ALL MODELS AVAILABLE FOR FAST DELIVERY!
Retractable cable
Aluminum Die
Cast Handle
Model
HDX-OTP Series
Handle
$
37
50
General Purpose Probe
Air Probe
D
**For economical plastic version of OL-705-PP,
order Model No. OL-706-PP, $68.
$
75
$
70
$
73
$
63
Heavy Duty
HDX Handle
Shown smaller
than actual size
ALL MODELS AVAILABLE
FOR FAST DELIVERY!

D-17
Linear Response Probes Series 700
700 Series Probes are compatible with OMEGA’s, 400 THC and THF Digital Thermometers (please see Section M).
To order probes with phone plug termination add “-PP” as a suffix to model number and add $7 to price. 3 m (10') extension cable with
phone plug connectors, model ON-EXT-10, $18.
Probes is to provide a complete probe assembly
for use with the circuits accepting the 44018 or
44019A thermistor composite.
Series 700 Temperature Probes use the 44018
thermistor composite as the temperature sensor.
On special order, probes can also be built with 44019
thermistor composite. The purpose of the Series 700
To Order
(Specify Model Number)
Configuration Model Number Description Price
OL-701
General Purpose. Used for short-term water
and sub-soil readings. Most rugged. probe. $47
Waterproof construction.
OL-701-V
Water resistant, soft, flexible,
vinyl tipped version of above model.
OL-702 Small Flexible. Vinyl sheath and tip. Cuvette 127
temperatures. General purpose measurement.
OL-731 General Purpose. Non-immersible, epoxy tipped 107
probe. Can be plotted in place. Probe is suitable
for temperature measurement on surfaces.
OL-708 “Banjo” Surface Temperature. Water bath, air 160
surfaces temperatures. Stainless steel.
OL-709 Attachable Surface Temperature. Stainless 56
steel cup, epoxy backed. Easy to tape on flat
surfaces. Good for heat loss or compression
efficiency study of piping.
OL-729 Small Surface Temperature. Cuvette, water,bath, 137
leaf and other surfaces. 610 mm (24") PFA-covered
flexible wire. Stainless steel disc with epoxy back.
OL-705 Air Temperature. Stainless steel probe suitable 66
for test rooms, incubators, remote air readings,
OL-706 monitoring of gas streams. etc. 61
OL-706 has an economical plastic housing.
OL-703 Tubular. Stainless steel probe for rugged duty. 63
Often used for liquid immersion. Probe is
immersible only to cap.
OL-704 Tubular-Glass. Chemically inert for liquid 141
immersion use. Thermometric titration. Freezing
point determination. Pyrex, 127 mm (5") long.
OL-710 Tubular With Fitting. Rugged, stainless steel 68
probe with pipe fitting. Suitable for taking
readings in pipes or inside closed vessels.
330 (13)
5.6
(
7
/32) D
7.9
(5/16) D approx
mm (inches)
7.1
(
9
/32)
4.0
(
5
/32) D
610 (24)
3.2
(
1
/8)
3.2
(
1
/8)
mm (inches)
38 (11/2)
92 (3
5
/8)
2 (
5
/64)
17 Gauge
10.3
(13
/32) D
mm (inches)
11 (7/16) D
3.2 (
1
/8)
mm (inches)
1.6 (1/16)
4.8
(
3
/16) D
610 (24)
3.2 (
1
/8)
mm (inches)
MAX
5.6 (0.220)
13
(
1
/2) D
32
(1
1
/4)
mm (inches)
114 (4 1/2)
3.2 (1/8) D
22.2
(
7
/8)
mm (inches)
9
/16
114 (41/2)
3.2 (1/8) D
1
/8 NPT
7.9 (5/16) Max
6.4
(1
/4) Max
3.6 (9/64) D
MOST POPULAR MODELS HIGHLIGHTED!

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