Rainbow TS-200S Capillary Thermostat

Rainbow · Temperature Control · TS-200S · Capillary Thermostat

What Is the Rainbow TS-200S Capillary Thermostat?

The Rainbow TS-200S is a capillary-type mechanical thermostat that provides precise temperature regulation across a 0 to 300 degrees Celsius range. It uses a fluid-filled capillary tube and diaphragm mechanism to sense temperature and actuate an electrical switch — no external power needed for sensing. Commonly found in industrial ovens, environmental chambers, and automation control panels.

In short: A 0-300 degrees Celsius capillary thermostat that uses a mechanical sensing bulb for reliable temperature switching in industrial heating and cooling equipment.

Key Features and What They Mean

1. Wide 0-300 degrees Celsius Range

What it means: Covers from ambient to high-temperature industrial processes with one device.
Why it matters: Eliminates the need for different thermostats for low-temp and high-temp zones in the same facility.
Result: Simplified spare parts inventory for multi-temperature equipment fleets.

2. Capillary Tube Sensing Mechanism

What it means: A sealed fluid-filled capillary bulb detects temperature changes through physical expansion and contraction.
Why it matters: No electronic components to drift, calibrate, or fail from voltage spikes.
Result: Decades-long service life in harsh industrial environments with minimal maintenance.

3. Snap-Action Electrical Contact

What it means: The switch makes or breaks with a fast snap to minimize arcing and contact wear.
Why it matters: Extends contact life and provides clean on/off signals to controllers or heaters.
Result: Reliable switching even at higher current loads.

Key Specifications

Typical Applications

• Industrial Drying Ovens: Maintaining set temperatures in paint curing, powder coating, and food dehydration ovens.
• Environmental Test Chambers: Regulating chamber temperature during thermal cycling tests of electronic components.
• Plastics Processing: Controlling barrel and mold temperatures in injection molding and extrusion lines.
• HVAC Duct Monitoring: Sensing duct air temperature for high-limit safety shutoff in commercial air handling systems.

Frequently Asked Questions

"What temperature range can the TS-200S actually control?"

The Rainbow TS-200S covers 0 to 300 degrees Celsius. The setpoint is adjusted mechanically via a dial or screw on the thermostat body. Check the actual setpoint calibration on your unit — mechanical thermostats may drift slightly over decades of use and can be recalibrated.

"Does this thermostat need external power to operate?"

The sensing mechanism is entirely mechanical — the capillary bulb and diaphragm actuate the switch without any external power. However, the switched circuit itself carries whatever voltage and current your application requires. Verify from the product label the maximum contact rating for your specific unit.

"Can I use this in a humid or washdown environment?"

The capillary bulb and tube are sealed against moisture ingress, but the thermostat body may require an appropriate enclosure (IP65 or higher) if exposed to direct water spray. The TS-200S is designed for panel mounting inside equipment cabinets — not for direct outdoor exposure without protection.

"What is the capillary tube length?"

Capillary tube lengths vary by configuration — common lengths range from 1 to 3 meters. Verify the tube length from your product label or listing photos. If you need a specific length, contact us at Moritta@KOEED.COM with your requirement.

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