Product Overview

The KPS 83 (060L310866) is a rugged, heavy-duty industrial thermostat from the Danfoss KPS series, specifically engineered for high-temperature monitoring and control in demanding maritime and industrial environments. Featuring a high-temperature setting range of 100 to 200 Celsius and a 2-meter capillary tube, this device allows for flexible mounting of the switch housing away from the heat source. In applications such as steam boiler control, large diesel engine exhaust monitoring, and industrial thermal oil systems, the KPS 83 provides critical safety and process regulation. Its specialized design offers extreme resistance to vibration and shock, ensuring the SPDT contact system maintains its integrity even under the harshest mechanical stressors found in offshore and heavy-process sectors.

Technical Configuration

The KPS 83 utilizes a vapor-charged sensing system connected via a 2-meter armored capillary tube to a sensing bulb. This configuration enables the sensor to be placed in high-heat zones while the control box remains in a more accessible or cooler location. The unit features a fixed mechanical differential of 18 Celsius, providing a stable switching cycle that prevents rapid oscillation in high-energy thermal systems. The sensing element is designed to withstand a maximum sensor temperature of 300 Celsius, providing a significant safety margin against thermal overruns. For process integration, the sensor is compatible with multiple sensor pocket lengths (65, 75, 110, or 160 mm), allowing for optimized immersion depths in various pipe diameters and tank sizes.

Technical Specifications

Technical FAQs

What is the advantage of a 2-meter capillary tube in high-temperature applications?

The 2-meter capillary tube allows the thermostat housing, which contains the sensitive microswitch and electrical terminals, to be mounted up to two meters away from the actual measurement point. This protects the electronics and plastic components from the extreme ambient heat (up to 200 deg C) of the process vessel or pipe.

Is the 18 deg C mechanical differential adjustable?

No, for the KPS 83 model, the 18 deg C differential is fixed. This means if you set the cut-out temperature at 150 deg C, the switch will automatically reset (cut-in) when the temperature drops to 132 deg C. This fixed gap is optimized for stability in high-inertia thermal systems.

Can this thermostat be used in seawater or corrosive environments?

While the KPS 83 housing is highly durable, the sensing bulb and capillary must be used with a suitable sensor pocket (thermowell) if the medium is corrosive. Using a stainless steel or specialized alloy pocket protects the sensing element from chemical attack and allows for sensor replacement without draining the system.

Engineering & Installation Guide

• Capillary Tube Routing: When installing the 2-meter capillary, avoid sharp bends or kinking the tube. A minimum bend radius of 25 mm should be maintained. Ensure the capillary is secured with clips to prevent it from vibrating against sharp metal edges, which could lead to a leak in the vapor charge and subsequent module failure.

• Sensor Pocket Selection: Choose a sensor pocket length (65 to 160 mm) that ensures the sensing bulb is located in the middle third of the pipe or flow stream. This ensures the most accurate representation of the medium temperature. Use thermal paste inside the pocket to reduce thermal lag between the medium and the sensor bulb.

• Electrical Termination for Marine Use: Given the KPS series' prevalence in marine applications, use stranded wire with ferrules for all connections. Ensure the Pg 13.5 or Pg 11 cable gland is tightened to maintain the enclosure's environmental seal, preventing salt air or moisture from corroding the SPDT contacts.