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Precision Thermostats

Matsuo thermostats  supplied by ATC Semitec are superior twin bimetal, electro-mechanical temperature controllers offering precision thermal control.  These precision bimetal thermostats have a unique internal structure that offers a combination of tolerance, differential and repeatability that is un-paralleled in the industry.  The twin bimetal system minimises calibration drift and ensures a long contact life from 100k – 1m cycles depending on applied load.

Matsuo thermostats offer excellent thermal protection and are ideal as anti-condensation thermostats, anti-freeze controls or frost protection thermostats especially in remote applications which demand long-term stability and maximum service life.

Matsuo thermostats are precision calibrated and then sealed within a PBT plastic housing giving excellent environmental resistance.  Calibrations from -10°C to +110°C are available with setting tolerances down to ±1.5K and differentials (hystereses) down to 3K.  AC loads up to 3A(250V) or 5A(125V) and DC loads up to 1.3A/24V or 0.8A/48V can be switched.

For high temperature applications, the M2HA ceramic thermostat offer calibrations upto 400°C. Matsuo’s M3Z is a change-over S.P.D.T. thermostat that is useful for triggering secondary circuits (e.g. visual alarms) when a set-point is reached.  The Matsuo MQT11H, MQT11K and M2F are integral thermostat/thermal fuse designs that offer temperature control and ultimate protection in a sealed plastic case.  They are therefore useful for some hazardous area applications, i.e. those requiring BASEEFA approval or ATEX certification.

Call us today on 01606 871680 to discuss your application’s thermal sensor requirements.  Using our extensive technical knowledge and innovative supplier base, we will work with you to provide the optimum solution for your product.

  • Matsuo MQT8 Precision Thermostats

    Smallest Matsuo thermostat available –  6.4 x 12.5 x 34mm

    The switching capacity is 1.3A/250VAC or 2A/125VAC.

    This thermostat is perfect for use in frost protection and anti-condensation applications.  The MQT8 is also available in a full moisture proof version MQT8H(DS)


  • Matsuo MQT11 Thermostat c/w Thermal Fuse

    The Matsuo MQT11 thermostat is a precision control that also has a built-in thermal fuse, offering integral one-shot thermal protection.

    The MQT11 can switch 2A/125VAC or 1.3A/250VAC and can be supplied with a tab to simplify mounting.

  • Matsuo M2/M3 Precision Thermostats

    Larger thermostats with higher switching capacities upto 3A/250VAC or 5A/125VAC.

    The M2 thermostat has a 10K differential whereas the M3’s reset temperature can be within 3.5K of its set-point.

    Casing size 45 x 15.5 x 10.8mm

  • Matsuo M2HA High Temperature Thermostat (400°C)

    The Matsuo M2HA is a high temperature ceramic thermostat available from 200°C to 400°C. The M2HA offers control options well above the temperature range of ceramic disc thermostats.

  • Matsuo M3Z Precision Thermostat (S.P.D.T. Version)

    The M3Z thermostat has S.P.D.T. change-over contacts capable of switching 3A/250VAC and 1.8A/250VAC respectively.

    Range -10°C to +110°C with temperature differentials down to 3.5K.

  • Matsuo MQT8H(DS) Special Thermostat Versions

    The MQT8H(DS) is a moisture-proof version of the Matsuo MQT8, offers long-life operation in refrigeration and outside applications.

    The special double-seal solution ensures moisture does not penetrate the thermal switch housing.