At a glance
| Booth | Q5339 |
| Country | JP |
| Website | www.rkcinst.co.jp |
Company profile
RKC INSTRUMENT INC. has grown for more than half a century from its origins as a specialist in industrial control equipment and operates as a measurement-and-control solution provider engaged in development, manufacturing, sales, and related business activities. Its solution structure combines hardware, software, and peripheral equipment: hardware includes controllers for temperature, pressure, and other processes, power controllers, field-network converters, sensors, and custom-designed products; software includes consulting, engineering, and before- and after-sales service; and peripheral equipment supports complete system construction. RKC applies quality-management systems across development, procurement, manufacturing, sales, shipping, and after-sales service in order to support product quality and reliability. The company was founded on May 20, 1937, reports capital of 55.6 million Yen with self-owned capital of 26.3 billion Yen and a self-owned capital ratio of 82.7%, and had 441 employees as of November 30, 2025; its head office is in Tokyo and its main factory is in Ibaraki, Japan. Its stated fields of business cover temperature-control equipment, temperature and humidity control equipment, control systems for semiconductor manufacturing, control systems for other process-control applications, small-scale instrumentation systems, melt-pressure sensors, and other sensors.
Exhibits
Digital Controllers GZ400 / GZ900 are specified with measurement accuracy of ±0.1% of displayed value, a 0.01 sec sampling time, an 11-segment 5 digit LCD display, a front-loader communication port, dual-input function, and plug-in construction. Ramp/Soak Controllers PZ400 / PZ900 provide 16 patterns by 16 segments, up to 256 segments by linking patterns, and 8-Level PID control. For rapid thermal processes such as lamp annealing, RKC identifies the need for a controller with fast sampling and an output device with fast response when temperature rises rapidly. For diffusion-furnace cascade temperature control where there is a large time lag between the controlled object and the heat source, the primary controller sends its control output to a secondary controller, which controls the heater while correcting its temperature setpoint; a single FZ400/FZ900 can implement this cascade control. In large OLED/LCD firing furnaces, where larger panels increase the number of required temperature-control zones, modular controllers can build a more compact multi-loop temperature-control system. For precision chillers, the Z-TIO-G is described as providing stable high-precision temperature control with 0.001℃ resolution. For semiconductor etching and cleaning processes that use highly corrosive chemical solutions, RKC applies corrosion-resistant sensors to temperature and liquid-level measurement. For glass-substrate firing and bonding, temperature distribution across the substrate and temperature at the bonding area can be measured to collect temperature profiles and verify that the temperature is appropriate. For semiconductor power-module thermal-design verification, temperature can be measured at the component level during actual operation, including small components. RKC's module-type controllers are mounted on DIN rails inside control cabinets and can be managed by PC, PLC, or HMI; modules connect side by side to reduce space and wiring in multi-loop systems, communication converters connect them to fieldbus networks, and module-level maintenance supports maintainability. The SRZ modular process/temperature controller is specified for temperature, process, and multi-loop control with ±0.2% of displayed value measurement accuracy, 0.25 sec sampling, four-channel control per module, a front-loader communication port, digital input/output and CT input modules, and connection to communication converters for various fieldbus systems. The SR Mini HG SYSTEM is specified with ±0.3% of span accuracy in the standard model and ±0.1% of span in the accurate model, sampling times of 0.5 sec and 0.1 sec respectively, and a selection of digital input/output, analog input/output, CT input, and temperature-input modules. The SR Mini HG SYSTEM version with PLC communication H-PCP-J adds the MAPMAN function for programmingless connection to a PLC while retaining the standard/accurate accuracy and sampling options and the broad module selection. The controller portfolio also lists digital-controller families RZ, RB, SA100, SA200, CB, REX-Century, FZ, FB, GZ, REX-F9000 and SB1; communication converters COM-ME, COM-MC, COM-KG and COM-A; multiloop controllers MA900 / MA901; PF900 ramp/soak control; FM Approved limit controllers; indicators; recorders; software; power controllers; solid-state relays; and heater-break alarms. RKC divides temperature sensing into contact and non-contact methods: contact sensors include thermocouples, platinum resistance temperature detectors, and thermistors, while non-contact sensors detect infrared radiation and include radiation temperature sensors; RKC supplies thermocouples and platinum resistance temperature detectors. Its temperature/humidity sensors measure ambient moisture percentage together with temperature and use a high-accuracy high-polymer resistance-type sensor. General-purpose temperature sensors are offered in different shapes and lengths, including sheath types emphasizing response, vibration resistance, and shock resistance, Nicrobell sheath thermocouples capable of measurement up to 900°C with a 1.0mm protection-tube diameter, noble-metal thermocouples up to 1500°C, and sanitary sensors for food, beverage, and pharmaceutical production processes. Film Type Temperature Sensors ST-50 series use a Type K thermocouple in thicknesses of 0.34mm and 0.13mm, can be attached to small-object surfaces or inserted between two touching surfaces with the Exposed-Tip Type, offer a Polyimide (PI) Insulation Type where electrical insulation is needed, and use rapid response for temperature profiling. ST-55 / ST-56 sensors measure the surface temperature of small objects, with a ceramic-coating type capable of measurement up to 500°C and adhesive-tape versions that can be attached to the measured object; sensor lengths can be varied to match applications. PFA-protected FT-100 Thermocouple K and FR-100 Resistance Temperature Detector products use a PFA protection tube for strong chemical resistance, allow selection between Thermocouple K and RTD sensing, offer optional ultrasonic cleaning with clean packing, and can be customized in length. The STM-A magnet-type temperature sensor uses an ST-50 adhesive temperature sensor as a replaceable sensing element and combines it with a magnet adaptor. RKC level sensors address different fluids with both continuous-level measurement and level-switch methods, and the range includes back-pressure measurement. The back-pressure level meter LE100 / LE110 performs level measurement and provides eight level outputs through one tube, is not influenced by adhering materials, and includes gravity correction and one-touch EMPTY/SPAN adjustment. LE100 / LE110 can also be used as a fluid-volume meter and a pressure meter. The LT1 back-pressure level switch detects high and low fluid levels using a single tube, is not influenced by adhering materials, and uses a PFA tube for measurement of corrosive liquids. LT1 incorporates a semiconductor pressure sensor and orifice and is operated by air purging to the tube at 20±1kPa. The broader product range includes level sensors LE100 / LE110 and LT1, radiation thermometers BTM-30 / BTM-40, BTM-80 and LTM-100, resin-pressure sensors CZ-100P, CZ-200P, PCT-300 and PG500, and power controllers including THV-10 variants, THV-A1, SSNP / SSNZ, THV-40 and THW-A. Named product families in the shared catalog include FM Approved limit controllers SA100L, SA200L and CB100L; indicators AG500 and AE500; handheld temperature indicator DP-350 with handheld sensors for stationary surfaces and for fluids or semi-solid interiors; recorders VGR-B100 and SBR-EW100 / EW180; software PROTEM3, Zeal2 and VGR-B100 TOOL; solid-state relays SSL and SSJ; and heater-break alarms HBA-22, HBA-T22 / HBA-T32 / HBA-T23 / HBA-T33, and HBA-T120 / HBA-T130. The semiconductor application pages also group the available equipment as digital controllers, module-type controllers, program controllers, digital handheld thermometers, recorders, temperature sensors, resin-pressure sensors, level sensors, radiation thermometers, and power controllers, while the Japanese page additionally lists wireless temperature sensors and control-output distributors.
Capabilities and products
- digital process/temperature controllers
- Ramp/Soak program temperature controllers
- cascade temperature control for diffusion furnaces
- modular multi-loop temperature control
- 0.001°C precision-chiller temperature control
- temperature/level sensing for highly corrosive chemicals
- thermocouples and platinum RTD temperature sensors
- sheath thermocouples up to 900°C
- noble-metal thermocouples up to 1500°C
- 0.34mm / 0.13mm thin-film Type K thermocouples
- PFA-protected chemical-resistant temperature sensors
- back-pressure level meters
- back-pressure level switches
- corrosive-liquid level measurement with PFA tubing
- radiation thermometers
- resin-pressure sensors
- power controllers
- field-network communication converters