stemco
358 Adjustable, Remote Sensing Thermostat
The 358 STEMCO Capillary Thermostats offer the same versatility as the 351 series, with the added benefit of a compact design featuring rear terminals. This allows the 358 series to fit in tight spaces where other controls may not be suitable. The rear terminal design not only saves space but also ensures easy installation in confined areas. The thermostat maintains high precision in temperature control while providing the same durability and performance as the 351 series, making it ideal for a variety of temperature-sensitive applications where space is limited.
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 STEMCO 358 series bulb and capillary thermostats compact design, utilizing rear terminals, permits use in tight spaces where other controls will not fit.
The SPDT switch action allows for break on temperature rise or fall. The 358 series is available with optional ambient compensation to offset the impact on calibration caused by the thermostat body being installed in high ambient locations.
The mounting bracket is available with standard mounting centers of 1.750”, 1.312”, 1.102” and 28mm making the 358 series ideal for use as a replacement thermostat.
Key Features & Applications of 358 Series Capillary Thermostats
The 358 series features SPDT switch action, providing flexibility to break on temperature rise or temperature fall. This ensures precise and adaptable temperature control for various applications.
Optional ambient compensation helps offset the impact on calibration when the thermostat body is installed in high ambient locations, ensuring precise temperature control even in challenging environments. With close tolerances and a narrow temperature differential, the 358 series is ideal for commercial cooking equipment, water heaters, & dishwashers.
Key Specifications:
- Temperature Range: -40°F to 675°F
- Adjustable Temperature Range
- Reset Options: Automatic Reset
- Switch Action: SPDT (Single Pole Double Throw)
- Amperage: 15-25 Amps @ 250VAC, +100,000 cycles
- Maximum Ambient Temperature: 250°F; Optional Ambient Compensation Available.
- Mounting Options: Front, Panel, or Back Mounting Options with Rear Terminal Locations
- Adjustment Options: Screwdriver or D-Shaft Adjustment
- Material Options: Copper, Nickel Plated Copper, One-Piece Stainless Steel, or Two-Piece Stainless Steel
- Variety of bulb & capillary diameters & lengths available.
- Variety of dial rotations available including 120°, 252°, 270° or 310°.
Durability & Protection:
Built with polycarbonate thermoplastic construction , these thermostats are weatherproof, corrosion-resistant, & designed for enhanced durability & long-term performance, even in harsh environments. Unlike digital thermostats, 351 Stemco thermostats are not affected by power surges, lightning strikes, or power outages, ensuring uninterrupted 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 E.G.O. EF Series . Our thermostats provide superior features and flexibility, ensuring you get the most reliable temperature control for your applications.
For a side-by-side comparison of how Senasys bulb & capillary thermostats measure up to competing models, view our cross-reference guide here .
BRANDS
STEMCO
358 Series
E.G.O.
EF Series
-40°F to 675°F Temperature Range
Adjustable Temperature
D-Shaft Adjustment Knobs
250°F Maximum Ambient Temperature
Automatic Reset
Screw Terminals, Rear Location
Wire Lead Options Available
Rated Up to 25A @ 120VAC
Single-pole, Single-throw (SPST) or Single-pole, Double-throw (SPDT)
Copper, Stainless Steel or 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 Screwdriver adjustment model with its front connect terminals is perfect for warming ovens, deep fat fryers, & commercial water heaters.
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.
D-shaft shown at 9 o’clock above. Turn shaft 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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