STI Thermostat Protectors – Cl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$21.97
STI Thermostat Protectors – Clear Polycarbonate Covers with Locking Options

STI Thermostat Protectors – Clear Polycarbonate Covers with Locking Options

(No reviews yet) Write a Review

Model: STI-9102
Selected Lock Type Option is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$21.97
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

STI Thermostat Protectors – Clear Polycarbonate Covers with Locking Options

STI Thermostat Protectors are tough polycarbonate enclosures designed to shield thermostats from tampering, vandalism, and accidental damage without hindering their operation. These covers are ideal for high-traffic or public-access areas such as schools, offices, and commercial buildings. Available in multiple shapes and sizes with both keyed and tamper-resistant options, each protector features a ventilated design to ensure proper airflow for temperature sensing and control.

Key Features

  • Protects thermostats from tampering, abuse, and accidental damage
  • Molded from durable, clear polycarbonate
  • Locking options include key lock, 1/4-turn lock, or tamperproof screws
  • Models available for both flush and surface mount installations
  • Frame vents allow free air circulation
  • Compatible spacers available for conduit clearance
  • Easy installation with included mounting hardware
  • Three-year guarantee against breakage in normal use
  • Operating temperature: -40°F to 250°F (-40°C to 121°C)

Manufacturer Resources

VIEW SPEC SHEET

Product Specs

Air Circulation:
Yes – Vent holes in frame
Environment:
Indoor Use – Public/Commercial Spaces
Included Hardware:
Screws, Anchors, Keys or Spanner Bits
Operating Temperature:
-40°F to 250°F (-40°C to 121°C)
Parent SKU:
STI-THERMO-GUARD
Product Line:
STI Thermostat Protectors
Spacer Compatibility:
KIT-900, KIT-901, KIT-905
Tamper Resistance:
Yes
Warranty:
Three-Year Guarantee Against Breakage (Normal Use)
Product Group:
Safety
Product Subgroup:
Protective Covers
Product Type:
Thermostat Protectors – Clear Polycarbonate Covers with Locking Options
Department:
Safety
Installation Options:
Flush Mount or Surface Mount
Product Material:
Clear Polycarbonate

Safety Technology International STI-9102 – Frequently Asked Questions

1) Will an STI thermostat protector fit over a thermostat mounted on a surface-mounted electrical box or conduit?
Yes, with a spacer. STI thermostat protectors come in flush mount and surface mount versions, and where conduit or a box sits proud of the wall you add a spacer kit to gain the depth. The compatible spacers are KIT-900, KIT-901 and KIT-905. Without one, a cover set flat to the wall can bottom out on the conduit body before the frame seats.
2) Does a clear polycarbonate cover over a thermostat make the room read the wrong temperature?
No. The frame of the STI thermostat protector is vented, so air circulates across the sensor and the thermostat keeps reading room temperature and controlling normally. That vented frame is the reason these can go over an active control rather than just a display.
3) Which lock option should I pick for a school or an office where tenants keep changing the setpoint?
Four configurations are offered: small with a 1/4 turn lock, small with a key lock, large with a key lock, and a dome in standard mounting. Key lock is the one to specify where you want only maintenance staff opening it, since it takes the key to get in. The 1/4 turn lock is a tool-open cover, faster for staff but not a barrier to anyone who has the turn tool. STI also builds these with tamperproof screws where you want it opened only with a spanner bit.
4) What comes in the box with an STI thermostat guard, and do I need to buy anything else to install it?
Mounting hardware ships with the cover: screws, anchors, and either keys or spanner bits depending on the lock option you order. For a normal flat wall that is everything you need. The only add-on to plan for is a spacer (KIT-900, KIT-901 or KIT-905) when conduit or a surface box needs clearance behind the frame.
5) Can I put an STI thermostat protector outdoors, or in an unheated warehouse or mechanical room?
These are specified for indoor use in public and commercial spaces, so an exterior wall is the wrong application. Unconditioned indoor space is fine on temperature: the polycarbonate is rated from -40F to 250F (-40C to 121C), which covers an unheated warehouse, a loading dock vestibule or a boiler room.
6) Small or large thermostat cover, and what is the dome version for?
Size by the thermostat footprint plus the wall plate and any subbase, not by the display. Small covers suit a compact residential-style stat; the large is for the bigger commercial units and anything with a mounting plate behind it. The dome is the round-profile version and mounts standard, useful over stats that project further off the wall than a flat cover will clear. All are molded from clear polycarbonate so the display and setpoint stay readable without opening the cover.
7) Will a thermostat guard actually stop tampering, or is it just a dust cover?
It is a tamper barrier. The enclosure is molded polycarbonate, not acrylic, and STI builds it to take abuse and vandalism as well as accidental knocks from carts and equipment in high-traffic areas. Paired with the key lock or tamperproof-screw option, a tenant or student cannot get to the setpoint without the key or the spanner bit.
8) Can I standardize one thermostat cover across a whole building when the stats are not all the same?
Partly, and it is worth planning before you order. The lock keying and the mounting hardware are common across the line, so staff carry one key or one spanner bit, but the cover size still has to match each thermostat footprint. A typical property ends up with small covers on the tenant spaces and large or dome covers over the bigger commercial stats, all opened the same way.
How fast can I get the Safety Technology International STI-9102 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Safety Technology International STI-9102 come with a warranty?
Absolutely. The Safety Technology International STI-9102 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Safety Technology International STI-9102?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Safety Technology International STI-9102 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!