An analyzer apparatus comprising: an ionization unit configured to ionize molecules to analyze; an ion lens configured to guide an ion flow to a filter unit; the filter unit configured to form a field for selectively passing ions generated by the ionization unit and received by the ion lens; a detector unit configured to detect ions that have passed through the filter unit; an ion drive circuitry configured to electrically drive the ionization unit; a field drive circuitry configured to electrically drive the filter unit; a sensor housing configured to house the ionization unit, the ion lens; the filter unit, and the detector unit in order; a chamber configured to house the sensor housing; a control box attached to the sensor housing and configured to house at least the ion drive circuitry and the field drive circuitry; a control unit configured to control outputs of the ion drive circuitry and the field drive circuitry; a temperature detecting unit configured to detect a temperature in the control box; wherein the control unit includes a correction unit configured to correct respective output settings of the ion drive circuitry and the field drive circuitry based on the temperature detected by the temperature detecting unit to suppress temperature dependencies of outputs of the ion drive circuitry and the field drive circuitry according to correction values and/or functions for calculating the correction values stored in advance for the detected temperature; a depressurization unit including a pump (31, 32) and a connecting pipe configured to depressurize the chamber; a heater configured to heat a vacuum system comprising the chamber and the connecting pipe; a vacuum and temperature control interface unit configured to: control the internal pressure of the chamber, monitor the temperature of the chamber and control the temperature of the heater; and a compact and portable housing unit configured to house at least the sensor housing, the control box including the temperature detection unit and the correction unit, the chamber, the depressurization unit, a pressure gauge configured to monitor the internal pressure of the chamber, a terminal block configured to connect internal and external wiring of the analyzer apparatus, a power supply unit and the heater. an ionization unit configured to ionize molecules to analyze; an ion lens configured to guide an ion flow to a filter unit; the filter unit configured to form a field for selectively passing ions generated by the ionization unit and received by the ion lens; a detector unit configured to detect ions that have passed through the filter unit; an ion drive circuitry configured to electrically drive the ionization unit; a field drive circuitry configured to electrically drive the filter unit; a sensor housing configured to house the ionization unit, the ion lens; the filter unit, and the detector unit in order; a chamber configured to house the sensor housing; a control box attached to the sensor housing and configured to house at least the ion drive circuitry and the field drive circuitry; a control unit configured to control outputs of the ion drive circuitry and the field drive circuitry; a temperature detecting unit configured to detect a temperature in the control box; wherein the control unit includes a correction unit configured to correct respective output settings of the ion drive circuitry and the field drive circuitry based on the temperature detected by the temperature detecting unit to suppress temperature dependencies of outputs of the ion drive circuitry and the field drive circuitry according to correction values and/or functions for calculating the correction values stored in advance for the detected temperature; a depressurization unit including a pump (31, 32) and a connecting pipe configured to depressurize the chamber; a heater configured to heat a vacuum system comprising the chamber and the connecting pipe; a vacuum and temperature control interface unit configured to: control the internal pressure of the chamber, monitor the temperature of the chamber and control the temperature of the heater; and a compact and portable housing unit configured to house at least the sensor housing, the control box including the temperature detection unit and the correction unit, the chamber, the depressurization unit, a pressure gauge configured to monitor the internal pressure of the chamber, a terminal block configured to connect internal and external wiring of the analyzer apparatus, a power supply unit and the heater.