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Klixon Probe Packages
 
   
 
 
 
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ORDERING
Here’s a breakdown of our part numbering system for probe packages:

Field 1
21542
(or 21557, 21544, 21562, or 21561)
Basic package describes general physical appearance and basic thermostat incorporated into device
Field 2
xx
Probe length times 2 (probe length is the length in inches from bottom of the hex to bottom of the device)
Field 3
xxx
Operating characteristics, assigned consecutively (Sensata will assign this number at the time your order is taken)
Field 4
xx
For wire leads, this is the length of wire in 6 inch increments (for 6" it would be 1, for 12" it would be 2, for 18" it would be 3, etc.). For connectors, contact Sensata Technologies for this code.

So, a 1/8" - pipe thread/connector (see "Standard Part Numbers and Configurations" at right) with probe length of 3" and with an 18" wire lead would be numbered: 21557-06-xxx-03.

Site Updated October 16, 2016

* * * Sensata > Products > Klixon Brand > Thermostats > Precision Thermostats >

Klixon® Thermostat Probe Packages: Fast Response, Tiny StatTM


This precision immersion thermostat incorporates the Klixon® 3BT Tiny Stat™ — the smallest, lightest, fastest snap–acting thermostat ever made.

Quick response to rapidly changing temperatures is a virtue of the low thermal mass series probes. The unique Klixon 3BT Tiny Stat is located at the end of the probe for ultimate sensitivity.

For more information, see the page of free drawings available or download the data sheet (file type: PDF).

Performance

Contact Ratings (Resistive) Based on standard differential
30 VAC/DC
115 VAC
Life
Cycles
Contacts
1.0 Amperes
1.0 Amperes
10,000
Silver
0.5 Amperes
0.5 Amperes
10,000
Gold

Vibration 10 to 2,000 Hz, 30 G.

Notes:
1.) Devices which open on temperature rise should not be subjected to vibration while at temperatures of
75°F or more below the opening temperature.
2.) Devices which close on temperature rise should not be subjected to vibration while at temperatures of
75°F or more above the closing temperature.


Characteristics
Contact Resistance
0.100 ohms max., (0.150 ohms max. for close on rise devices with setpoints greater than 175°F) per MIL-STD-202, Method 307
Dielectric Strength
1250 VAC, rms, 60 cycles for 1 minute (leads to case), per MIL-STD-202, Method 301
Operating Temperature Range
0°F to 350°F (-17.8°C to 176.7°C)
Ambient Temperature Range
-80°F to 400°F (-62.2°C to 204.4°C)
Operating Temperature Tolerances
± 10°F (± 5.6°C)
Differential
between opening and closing temperatures: 30°F (16.7°C)

Configurations

Standard 3BT probe packages are comprised of the following physical features, but many other variants are available to meet your needs.

PLEASE NOTE: The orientation of the connector with respect to the package body is not controlled.

Configuration Options - Custom configurations are available
Probe Body Thread Sizes
Standard lengths are available in ½" increments, from 1.0" to 4". Standard probe bodies are available with the following thread sizes:
7/16" - 20
1/8" - 27 NPT
Termination
Standard connector is a Sealtron B80L1G-10SL-4P-F-M129 (or equivalent)
Standard wire leads are AWG #22 stranded wire with white or black Teflon insulation (per MIL-W-22759) (Teflon is a trademark of E. I. Dupont de Namers and Co.)
Finish
The standard material is stainless steel
Other
Other styles are available, as well as custom designs

Standard Part Numbers and Configurations - Many other styles are available Also, see free drawings available for download.
21544
1/8" pipe thread with leads
21557
1/8" pipe thread with connector
21561
7/16" - 20 thread with leads
21562
7/16" - 20 thread with connector
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Klixon
Miniature Thermostats


Drawing
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