Digital Thermostat 8820 with NTC Sensor – Temperature Controller -50°C to +150°C

8820 Digital Thermostat – At a Glance

• Replaces Eliwell ID & capillary thermostats – one controller for multiple applications.

• Wider temperature range: -50°C to +150°C (Heating & Cooling).

• Stronger relay: Built-in 20A mains relay – no need for extra contactors.

• More accurate: ±0.4°C vs ±5–10°C for capillary thermostats.

• Clear display: Digital temperature readout, unlike capillary dials.

• IP65 protection: Safe in catering, refrigeration & damp environments.

• Easy install: Compact size (33x75mm front, 29x71mm cutout).

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The Digital Thermostat 8820 NTC Sensor from Under Control Instruments is a high-specification temperature controller designed for accurate and reliable heating or cooling control. Compact in size (33 x 75mm front, 29 x 71mm cutout), this controller features a single digital display with easy-to-use ON/OFF control, making it ideal for a wide range of industrial, catering, and refrigeration applications.

Supplied with two 2m NTC sensors, the 8820 can monitor and regulate temperatures across a wide -50°C to +150°C range, ensuring precision in even the most demanding environments. A powerful 20A relay output is included as standard, eliminating the need for additional external relays or contactors and reducing both cost and installation space.

With its IP65-rated front panel, this thermostat is resistant to dust, moisture, and cleaning processes, making it highly suited for use in commercial kitchens, food preparation areas, and refrigeration systems.

The 8820 Digital Thermostat also serves as a direct replacement for traditional capillary thermostats or popular controllers such as the Eliwell ID series, delivering superior accuracy, clear visual temperature feedback, and improved reliability.

Key Features

• Accurate Digital Control: Replaces mechanical thermostats with precise temperature regulation

• Temperature Range: -50°C to +150°C, suitable for heating and cooling

• Compact Size: 33 x 75mm front panel, 29 x 71mm cutout

• Dual NTC Sensors: Supplied with two 2m NTC probes for flexible monitoring

• 20A Relay Output: Handles high loads directly without external relays or contactors

• IP65 Front Panel: Protection against dust, moisture, and cleaning sprays

• ON/OFF Control: Simple and reliable switching for most applications

• Versatile Use: Suitable for refrigeration, catering equipment, food prep areas, and industrial processes

• Direct Replacement: Can replace Eliwell ID controllers and capillary thermostats

Typical Applications

• Commercial and industrial refrigeration

• Catering equipment and ovens

• Heating and cooling systems

• Food preparation and storage areas

• General temperature-sensitive processes

The Digital Thermostat 8820 NTC Sensor offers precise, reliable, and efficient temperature control — making it the perfect upgrade for refrigeration, catering, and heating applications.

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Digital Thermostat Comparison Table

Feature / Model	Digital Thermostat 8820	Eliwell ID Series	Capillary Thermostat
Control Type	Digital ON/OFF	Digital ON/OFF	Mechanical ON/OFF
Temperature Range	-50°C to +150°C	-50°C to +150°C	Limited (typically 0°C to +300°C, less accurate)
Display	Single digital display	Digital display	No display
Relay Output	20A mains relay (built-in)	Typically 8–16A	N/A (direct switching only)
Sensors	2x NTC sensors (2m each)	NTC sensor	Bulb & capillary tube
Protection Rating	IP65 front panel	IP65 (most models)	Not protected
Size / Cutout	33 x 75mm (front) / 29 x 71mm (cutout)	Varies by model	N/A
Accuracy	±0.4°C @ 25°C	±0.5°C typical	Variable (±5–10°C)
Heating & Cooling Control	Yes	Yes	Heating only
Replaceable Alternative	Yes (replaces Eliwell ID & capillary)	Yes	Legacy use only
Ease of Use	Plug & play, configurable	Configurable, menus	Simple dial control
Applications	Catering, refrigeration, heating/cooling	Catering & refrigeration	Ovens, fryers, heating ranges

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🔑 Why Choose the Digital Thermostat 8820?

✔ High load capacity with built-in 20A relay – no extra contactor required
✔ Accurate digital display for clear monitoring
✔ Wide -50°C to +150°C range suitable for heating and refrigeration
✔ Compact, IP65-rated design – built for tough commercial environments
✔ Direct replacement for both Eliwell ID controllers and capillary thermostats