CE, RoHS
Compliance tested and documented per batch
Mechanical Bimetal Cabinet Thermostats
No power supply, no configuration, no failure modes to explain to customers. The bimetal thermostat is the most dependable component in cabinet climate control. KTS011 is normally open, closing when temperature rises to start a cooling fan; KTO011 is normally closed, keeping a heater on until the cabinet warms. Both cover 0-60C with a 7K switching differential.
Why a Bimetal Thermostat Needs No Power
A bimetal strip does the work of sensor and switch in one piece of metal. When the cabinet warms, the strip bends and closes the contact. When it cools, the strip springs back and opens the circuit. No power supply, no standby draw, no electronic controller to fail.
The 7K differential keeps the fan or heater in a steady cycle. A regular thermostat switching every few degrees would click the fan on and off every minute, wearing the contacts and shortening the load. The 7K gap, roughly 7 degrees apart, means the fan runs for a useful stretch and then stays off long enough to matter. KTS011 (NO) and KTO011 (NC) share the same 35mm DIN-rail footprint and cover 0-60C, with a contact rating of AC250V 10A that handles most cabinet fans and heaters directly.
Browse Mechanical Thermostats Products
ETF012
ETF012 Electronic Hygrotherm is a DIN‑rail mount combined temperature & humidity controller designed for electrical enclosures. It continuously detects ambient temperature and relative humidity inside cabinets, automatically activating heaters or fans once values exceed preset thresholds to prevent condensation and overheating. Built with UL94‑0 flame‑retardant plastic housing, SPDT contact and long service life over 50,000 […]
KTO012
KTO012 is a compact mechanical normally‑closed thermostat for electrical cabinets, designed to control cabinet heaters and maintain proper internal temperature. It adopts bimetallic thermal sensing technology, stable and reliable without power supply. DIN‑rail mounting saves cabinet space, widely used in control cabinets, power systems, machinery and renewable energy equipment to prevent condensation and low‑temperature faults. […]
KTO013
The KTO013 normally‑closed small thermostat is a DIN‑rail mount mechanical temperature controller designed for cabinet heating applications. Adopting a bimetallic thermal sensor and snap‑action contact, it delivers reliable temperature monitoring and automatic heating control inside electrical enclosures. The compact PC housing and wide adjustable temperature range make it widely matched with cabinet heaters, filter fans […]
KTO021
The KTO021 Bimetal Mechanical Thermostat is designed for electrical cabinet thermal management. Adopting bimetallic sensing element and snap‑action contact, it delivers reliable and precise temperature control inside enclosures. With compact structure and 35 mm DIN‑rail mounting design, this mechanical thermostat features a wide adjustable temperature range (0~60℃, customizable). The red/blue color‑coded rotary knob enables easy temperature […]
KTO021
KTS021 is a normally‑open bimetal mechanical thermostat designed for cooling control. Featuring snap‑action contact and reliable mechanical structure, it delivers precise cabinet temperature regulation. It can work stably in harsh environments from -45℃ to +80℃, widely used to activate cooling fans or alarm signal devices inside electrical enclosures. Compact DIN‑rail mounting design simplifies installation. The […]
KTO111
NOXT delivers professional cabinet thermal management solutions. Our product portfolio covers mechanical & electronic temperature and humidity controllers, enclosure heaters, fan heaters, filter fans and intelligent dehumidifiers. We are a direct manufacturer offering customized service, with international certifications including CE and RoHS. The KTO111 mechanical small thermostat is a normally‑closed bimetallic temperature controller specially designed […]
KTO511
KTO511 compact mechanical bimetallic thermostats designed for electrical cabinet temperature control. KTO511 is normally‑closed for heater control, while KTS511 is normally‑open to trigger cooling fans. With a durable snap‑action contact structure, long service life and wide voltage compatibility, these small DIN‑rail thermostats deliver reliable temperature regulation inside enclosures, preventing overheating or condensation. The units have […]
KTS011
KTS011 is a normally‑open mechanical cabinet thermostat dedicated to cooling control. Built with thermostatic bimetal sensing element and snap‑action contact structure, it automatically activates cooling fans or alarm signal devices once the internal cabinet temperature exceeds your preset value, effectively preventing electrical components from overheating. This compact temperature controller adopts standard 35 mm DIN‑rail installation, featuring […]
KTS012
The KTS012 normally‑open mechanical thermostat is a DIN‑rail mountable bimetallic temperature controller. It monitors the internal temperature of electrical enclosures and automatically activates cooling fans once the temperature exceeds your preset value. It offers reliable overheat protection for cabinets, distribution boxes and various industrial control equipment.
KTS013
The KTS013 normally‑open mechanical bimetal thermostat is a compact DIN‑rail temperature controller designed for cooling control inside electrical cabinets. It automatically activates cooling fans or alarm devices once ambient temperature exceeds your preset value. Built for industrial enclosures, it prevents overheating damage to electronic components and supports stable operation within harsh temperature environments of ‑45℃ […]
KTS111
KTS111 (also named KTS011) is a compact normally‑open bimetallic mechanical thermostat designed for enclosure cooling control. Adopting bimetal temperature sensing element and snap‑action contact, it realizes automatic fan control for electrical cabinets. Made of flame‑retardant PC housing, this tiny thermostat features 0~60℃ adjustable temperature range. It clips onto standard 35 mm DIN rail for quick installation. […]
KTS511
KTS511 is a compact bimetallic mechanical normally‑open thermostat, widely used inside electrical enclosures. It automatically activates cooling fans or warning indicators once the cabinet temperature rises above the preset value, preventing overheating damage to electronic components. With a small size of 60×46×34 mm and only 40 g weight, it adopts a DIN‑rail mounting design for […]
MFR012
The NOXT MFR012 mechanical hygrostat is a DIN‑rail mounted humidity switch designed for automatic cabinet humidity management and condensation prevention. It adopts a mechanical sensing structure with an adjustable relative humidity setting range from 40%RH to 90%RH, reliably activating cabinet heaters or cooling fans to stabilize internal humidity and avoid moisture damage to electrical components. […]
REX011
REX011 explosion‑proof thermostat adopts bimetallic sensor structure with normally closed contact. Featuring high switching capacity, it can directly control matched heaters. It is a mechanical temperature controller with fast response and stable temperature accuracy. Housed in an anodized aluminum shell and rated IP65 protection, the thermostat has obtained ATEX certification, perfectly adapted to hazardous explosive […]
ZR011
ZR011 is a dual‑function mechanical thermostat designed for electrical enclosure temperature management. It adopts bimetallic sensing technology with no battery required, reliably regulating cabinet heating and cooling equipment simultaneously. Boasting a wide voltage range from DC24V to AC230V and an operating temperature span of -20℃~80℃, this DIN‑rail mounted thermostat delivers stable performance under complex working […]
ZR111
ZR111 mechanical dual thermostat integrates normally closed and normally open temperature control contacts in a single unit, specially designed for electrical cabinet thermal management. Equipped with two independent adjustable temperature knobs, it can automatically activate heaters for warming or cooling fans for heat dissipation according to cabinet temperature changes, maintaining stable internal operating conditions for […]
How to Choose a Mechanical Thermostat, Full Selection Guide
Choose KTS011 (normally open). It closes when temperature rises and starts the fan. The 7K differential prevents the fan from cycling on and off every minute.
Choose KTO011 (normally closed). It opens when temperature reaches the set point, so the heater stays on when the cabinet is cold and off when it is warm.
Order the pair. KTS011 for the fan and KTO011 for the heater, both on the same DIN rail. The 7K differential suits both functions.
Send the load type, voltage and cabinet temperature range. NOXT confirms the thermostat model within 24 hours.
VDE-style approval docs
Available on request for each batch
35mm DIN-rail
Any orientation, no power wiring
OEM from 100 pcs
Custom temperature set points and packaging
Inquiry FAQ
No. The bimetal strip is both sensor and switch, so there is no supply wiring, no standby consumption and no electronic failure mode.
The thermostat switches on and off roughly 7K apart, for example on at 30C and off at 23C. This prevents rapid on-off cycling that shortens fan and heater life.
AC250V 10A per contact. For larger loads, use the thermostat to drive a contactor.
Normally open (KTS011) suits cooling: close the circuit when hot. Normally closed (KTO011) suits heating: break the circuit when warm so the heater runs when cold. Using both gives cold-plus-hot control.