Description
Omega CT508 Circular Chart Recorder Temp Humidity 2A 110VAC 30VDC For Parts
The Omega CT508 is a benchtop/wall-mount circular chart recorder designed to continuously log temperature and humidity over time on a rotating circular chart disc. It features dual recording pens — one for temperature, one for relative humidity — driven by independent pen arms across the chart face. A front-panel LCD provides a digital readout, and a relay contact output (rated 2A at 110VAC or 30VDC) allows connection to alarms or external control systems. Power is supplied via an external AC adapter or battery pack. This unit is being sold for parts or repair.
Specifications & What's Included
- Model: Omega Engineering CT508
- Type: Circular Chart Recorder
- Measurements: Temperature and Relative Humidity (two-pen recording)
- Relay Contact Rating: 2A 110VAC / 2A 30VDC Maximum
- Power: External AC adapter (110VAC) or battery pack (30VDC) — neither included
- Display: Front-panel LCD
- Front Panel Controls: PWR switch, Chart Type selector switches, temperature scale selector (°C/°F), RH/°C/°F selector
- Connectors: DIN-style connector (side panel), coaxial power jack (side panel)
- Relay Terminal: Rear-panel screw terminal block
- Chart Medium: Circular rotating chart paper (disc style)
- Form Factor: Benchtop or wall-mountable (keyhole slots on rear)
- Manufactured by: Omega Engineering Inc., engineered and manufactured in USA; case parts made in Canada
- Missing: AC adapter (not included)
- Missing: Battery compartment cover (not included)
- Calibration seal present but broken
- No chart paper loaded
Applications
Circular chart recorders like the Omega CT508 are used to create a continuous, time-stamped paper record of environmental conditions — most commonly temperature and humidity — in settings where a permanent hard-copy log is required or preferred over digital data logging. Typical applications include environmental monitoring in warehouses, cold storage facilities, cleanrooms, laboratories, greenhouses, and pharmaceutical storage areas where regulatory or quality-control records must be maintained. The built-in relay contact allows integration with alarm systems that trigger when conditions go out of range. Omega Engineering has been a widely recognized supplier of temperature, humidity, and process measurement instruments, and the CT-series recorders were popular in industrial and laboratory environments through the 1990s and 2000s. Replacement chart paper, AC adapters, and battery covers for this series are available from Omega and third-party suppliers, making repair or restoration feasible.
This Omega CT508 Circular Chart Recorder is being sold as-is for parts or repair. It is missing the AC adapter and the battery compartment cover, both of which are required for normal operation. The unit has not been tested and no functionality is guaranteed. The housing is in fair cosmetic condition with some light yellowing typical of older instrumentation. The circular chart window, pen arms (temperature and humidity), interior chart mechanism, LCD display, front panel switches, DIN side connector, and relay contact terminal block all appear physically intact based on photos. The calibration seal on the front panel has been broken. This unit may serve as a useful source of parts or a candidate for repair if the missing accessories are sourced. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Omega Engineering |
Model: |
CT508 |
MPN: |
CT508 |
Type: |
Circular Chart Recorder |
SKU: |
39669 |
Condition: |
As-Is / For Parts or Not Working |
Seller Notes: |
Missing AC adapter and battery cover. Sold as-is for parts or repair. |
Country/Region of Manufacture: |
United States |
Form Factor: |
Benchtop / Wall-Mount |
Relay Contact Rating: |
2A 110VAC / 2A 30VDC Maximum |
Power Requirements: |
110VAC or 30VDC (AC adapter required) |
Measurement Type: |
Temperature and Humidity |
Chart Type: |
Circular |
Number of Pens/Channels: |
2 (Temperature, Humidity) |
Display Type: |
LCD |
Interface/Connector: |
DIN connector (side), coaxial power jack |
Recording Medium: |
Circular chart paper |
Compatible With: |
Omega CT-series circular chart paper |
PWR Switch: |
Yes — front panel power switch present |
Chart Type Switch: |
Yes — front panel Chart Type selector |
Temperature Scale: |
°C / °F selectable |
Humidity Scale: |
RH / °C / °F (selectable per label) |
Condition Notes: |
Omega CT508 Circular Chart Recorder sold as-is for parts or repair. Missing AC adapter and battery cover. Not tested, no functionality guaranteed. Housing shows light yellowing. Mechanism appears physically intact. Please contact us with questions. |
