stemco
354 Stemco Capillary Thermostats
The 354 Stemco Capillary Thermostats are engineered for applications that demand tight tolerances & precise calibration at the desired nominal temperature setpoint. The adjustable shaft of the 354 thermostat features a “through shaft” design, allowing it to extend through the control for smooth rotation. This design ensures repeatability of the setpoint throughout the entire dial rotation, making it ideal for applications requiring high-accuracy temperature control.
quality ambient compensation
Our capillary thermostats feature ambient compensation to offset temperature differentials, ensuring greater accuracy as environmental conditions change. This technology helps maintain reliable temperature control, even in fluctuating surroundings, making our thermostat controls ideal for dynamic applications.
CERTIFIED
Senasys ensures the quality control & reliable operation of all our products. Every capillary thermostat is 100% tested individually before leaving our facility to guarantee consistent performance. Our capillary thermostats are UL & cUL approved, meeting industry standards for safety & reliability.
CUSTOM OPTIONS
Senasys capillary thermostat switches are available as custom-built temperature control solutions, tailored to meet your exact specifications. This ensures you receive the precise capillary thermostat switch you need, without paying for unnecessary features, optimizing both performance & cost.
MADE IN U.S.A.
All Senasys products are designed, manufactured, tested, & shipped from our facilities in Eau Claire, WI to clients worldwide. Every switch is individually 100% tested for quality & performance before leaving our plant, ensuring reliable operation for every customer.
The 354 Stemco Capillary Thermostats are designed for applications that require tight tolerances & close calibration at the desired nominal temperature setpoint. The adjustable shaft features a “through shaft” design, allowing smooth rotation throughout the dial, ensuring repeatability & consistent performance across the entire temperature range.
Applications & Features of 354 Stemco Capillary Thermostats
The 354 Stemco thermostats are ideal for applications requiring high-precision temperature control. Their adjustable shaft design ensures repeatability, making them suitable for industries where consistent, reliable temperature regulation is essential. These thermostats are used in various applications, including those with demanding calibration standards.
With the “through shaft” design, the 354 Stemco thermostats provide a smooth & consistent rotational operation, ensuring that the temperature setpoint is easily adjustable & remains accurate throughout the entire dial range.
Key Specifications:
- Temperature Range: 0°F to 700°F
- Reset Options: Automatic or Manual Reset
- Switch Action: SPDT (Single Pole Double Throw)
- Amperage: 15-25 Amps @ 120VAC
- Maximum Ambient Temperature: 250°F
- Mounting Options: Panel, Back, or Side Mounting
- Adjustment Options: Screwdriver or D-Shaft Adjustment
- Material Options: Copper, Nickel Plated Copper, Stainless Steel (One-Piece or Two-Piece)
Durability & Protection
Built with polycarbonate thermoplastic construction, the 354 Stemco Capillary Thermostats are weatherproof & corrosion-resistant, offering enhanced durability for long-term performance even in harsh environments. Unlike digital thermostats, the 354 Stemco thermostats are not affected by power surges, lightning strikes, or power outages, ensuring uninterrupted & reliable temperature control.
Cross Reference
We’re confident in the quality of our 354 Stemco Bulb & Capillary Thermostats, which is why we’ve compared them against other leading brands such as Peco. Use this cross-reference guide to see how our adjustable temperature range, D Shaft adjustment knob, auto reset, and screw terminals stack up against Peco’s T103 Series. Our thermostats provide superior features and flexibility, ensuring you get the most reliable temperature control for your applications.
BRANDS
STEMCO
354 Series
PECO
T103 Series
Adjustable Temp Range: -40-675°F
D Shaft Adjustment Knob
Auto Reset
Single Stage
Screw Terminals
Rated Up to 25 Amps @ 120VAC
Copper, Stainless Steel, One-Piece Stainless Steel & Dull-Nickel Plated Material
UL / cUL Listed
Made in U.S.A.
Common Applications
Single Stage Bulb & Capillary Thermostats are widely used in food service equipment, HVAC systems, & industrial applications to precisely control & limit heating element temperatures. These thermostats ensure reliable performance in various environments, from commercial kitchens to large-scale industrial operations. Explore how these versatile thermostats provide accurate temperature regulation across different sectors.
Mounting Options
The D-Shaft adjustable model allows for easy installation of a knob, making it ideal for applications such as convection ovens, charbroilers, dishwashers, grills, electric toasters, & toaster ovens.
All dimensions are provided in inches / millimeters, with ‘A’ & ‘C’ adjustable per the customer’s specifications.
Shown with standard side mount & 0.250″ diameter D-shaft. The d-shaft is shown positioned at 3 O’Clock at the high stop setting (fully counterclockwise.
Shown with optional side mount & optional spacer. The D-shaft is 0.156″ diameter. The D-shaft is shown positioned at 6 o’clock at the high stop setting (fully counterclockwise).
Shown with optional side mount bracket. The shaft is 0.156″ diameter. The D-shaft is shown positioned at 6 o’clock at high stop setting (fully counterclockwise).
Fitting Options
Our Single Stage Bulb & Capillary Thermostats are available with a variety of standard fittings and bulb supports to ensure compatibility with a wide range of applications. Choose from multiple thread materials like brass or stainless steel, with different hex sizes, lengths, and finishes to meet your specific needs.
Below are the available fitting options for thread sizes ranging from 1/8 NPT to 1/2 NPT, ensuring a perfect fit for your equipment. See the complete list of available options and corresponding part numbers.
Standard Fittings
Thread
Material
Hex Size
‘L’ Length
Finish
Part #
1/8 NPT
Brass
7/16″
0.625″
None
368-67-03061
1/8 NPT
S-Steel
7/16″
0.625″
None
368-67-03023
1/4 NPT
Brass
5/8″
0.750″
None
368-67-03201
1/4 NPT
Brass
5/8″
0.750″
Nicked Plated
368-67-03202
1/4 NPT
S-Steel
5/8″
0.750″
None
368-67-03161
3/8 NPT
Brass
11/16″
0.750″
None
368-67-03001
3/8 NPT
Brass
11/16″
0.750″
Bright Nickel
368-67-03001P
3/8 NPT
S-Steel
11/16″
0.750″
None
368-67-03002
1/2 NPT
Brass
7/8″
0.875″
None
368-67-03101
1/2 NPT
Brass
7/8″
0.875″
Bright Nickel
368-67-03102
1/2 NPT
S-Steel
7/8″
0.875″
None
368-67-03103
Bulb Support Fittings
Our Single Stage Bulb & Capillary Thermostats are available with a variety of standard fittings & bulb supports to ensure compatibility with a wide range of applications. Choose from multiple thread materials like brass or stainless steel, with different hex sizes, lengths, & finishes to meet your specific needs.
Below are the available fitting options for thread sizes ranging from 1/8 NPT to 1/2 NPT, ensuring a perfect fit for your equipment. See the complete list of available options & corresponding part numbers.
Standard Bulb Support Fittings
Thread
Material
Hex Size
‘L’ Length
‘A’ Dia.
‘B’ Dia.
Finish
Part #
1/4 NPT
Brass
5/8″
1.620″
0.257″
0.390″
None
368-67-03241
1/4 NPT
S-Steel
5/8″
1.620″
0.147″
0.390″
None
368-67-03242
1/4 NPT
S-Steel
5/8″
1.620″
0.257″
0.390″
None
368-67-03243
1/2 NPT
S-Steel
7/8″
1.372″
0.257″
0.315″
None
368-67-03261
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