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Dickson Temperature & Humidity Round Chart Recorders
Dickson round chart recorders provide a visible paper record of temperature or temperature and humidity for routine inspection and filing.
- 3-inch SC3: compact temperature recorder
- 4-inch SL4: temperature recorder with digital display
- 8-inch KT8: temperature recording with sensor and channel options
- 8-inch TH8: temperature and relative humidity recording
- Replacement selection assistance for older KT6, TH6, KT8P, KT856 and TH8P models
Send your existing model number, measurement range and chart reference so we can help identify a suitable configuration.
Dickson Temperature and Humidity Chart Recorders
Dickson KT8 and TH8 chart recorders provide an on-site paper record that operators can inspect, annotate and file. Choose the instrument according to what you need to measure, where the sensor will be installed and how the record will be used.
3-Inch Temperature Chart Recorders
The compact SC3 family records temperature where installation space is limited. Select the model and matching chart for the required temperature range.
| Model | Chart size | Temperature chart range |
|---|---|---|
| SC367 | 3-inch | -25 to 0°C |
| SC377 | 3-inch | -15 to +10°C |
| SC386 | 3-inch | -5 to +20°C |
| SC387 | 3-inch | +10 to +35°C |
| SC397 | 3-inch | +25 to +50°C |
4-Inch Temperature Chart Recorders
The SL4 family provides temperature recording with a digital display. These models measure temperature only.
| Model | Chart size | Temperature chart range |
|---|---|---|
| SL4100 | 4-inch | 0 to 100°F; Celsius chart approximately -18 to +37°C |
| SL4350 | 4-inch | -30 to +50°C / -22 to +122°F |
Match the chart reference, units and recording duration to the selected instrument. Chart scales do not replace the instrument's operating specifications.
8-Inch Temperature Chart Recorders
| Model | Measurement configuration | Recording pens |
|---|---|---|
| KT8-20 | Single temperature — thermistor | 1 |
| KT8-21 | Dual temperature — thermistor | 2 |
| KT8-30 | Single temperature — K-type thermocouple | 1 |
| KT8-30R | Single temperature — K-type thermocouple, with relay | 1 |
| KT8-31 | Dual temperature — K-type thermocouple | 2 |
| KT8-31R | Dual temperature — K-type thermocouple, with relay | 2 |
| KT8-40 | RTD temperature | 1 |
| KT8-50 | Ambient temperature | 1 |
8-Inch Temperature and Humidity Chart Recorders
| Model | Measurement configuration | Selection note |
|---|---|---|
| TH8-10 | Temperature and relative humidity | Standard configuration |
| TH8-11 | Temperature and relative humidity | Configuration with sensor extension cable |
| TH8-11R | Temperature and relative humidity, with relay | Confirm sensor placement and relay requirements |
| TH8-12 | Listed in Dickson's chart compatibility documentation | Confirm the exact configuration and current availability before ordering |
Older Models and Replacement Selection
The models below are included to help identify existing installations. Suggested alternatives require an application review; they are not guaranteed direct replacements.
| Existing model | Original chart size | Replacement selection route |
|---|---|---|
| KT6P1 | 6-inch | Evaluate KT8-30 for a compatible K-type temperature application |
| KT6P2 | 6-inch | Evaluate KT8-30; confirm probe and recording requirements |
| KT6P5 | 6-inch | Evaluate KT8-30R where a relay is required |
| TH6P1 | 6-inch | Evaluate TH8-10 for temperature and humidity recording |
| TH6P2 | 6-inch | Evaluate TH8-10; confirm sensor location |
| TH6P3 | 6-inch | Evaluate TH8-11 for remote sensor placement |
| KT8P0 | 8-inch | Evaluate KT8-30; confirm power and probe requirements |
| KT8P2 | 8-inch | Evaluate KT8-30 |
| KT8P3 | 8-inch | Evaluate KT8-30 or KT8-30R according to relay requirements |
| KT856 | 8-inch | Evaluate KT8-31 or KT8-31R for dual-temperature recording |
| TH8P0 | 8-inch | Evaluate TH8-10; confirm power requirements |
| TH8P2 | 8-inch | Evaluate TH8-10 |
| TH8P3 | 8-inch | Evaluate TH8-10 or TH8-11 according to sensor placement |
| TH8P5 | 8-inch | Evaluate TH8-11 or TH8-11R according to sensor and relay requirements |
Before selecting a replacement: provide the complete model number, probe details, temperature and humidity ranges, chart reference, recording duration and any alarm or relay requirements. Changing from a 6-inch to an 8-inch recorder also requires a review of mounting space and consumables.
Replacing an existing recorder? Chart size alone does not establish compatibility. Confirm the measurement range, probe arrangement, recording duration, power supply and chart reference before selecting the replacement.
The SC3 and SL4 are compact temperature-recording options, not direct replacements for TH6 or TH8 humidity recorders. Moving from a 6-inch recorder to an 8-inch model also requires a review of mounting space and consumables.
Replacement Options for Older Models
The following table is a starting point for replacement selection. These are functional alternatives to evaluate, not a guarantee of identical dimensions, wiring, accessories or performance.
| Existing model | Current model to consider | What to confirm |
|---|---|---|
| TH8P0, TH8P2 or TH8P3 | TH8-10 | Temperature and humidity range, sensor location and alarm requirements |
| TH8P5 or an older TH8 installation requiring remote sensing | TH8-11 | Required extension cable length and conditions at the sensor location |
| KT8P0, KT8P2 or KT8P3 | KT8-30 for a K-type thermocouple application | Existing probe type, connector, temperature range and chart scale |
| KT856 | KT8-31R for a dual-temperature thermocouple application | Both temperature channels, probe compatibility and any relay requirements |
| Older KT6 or TH6 models shown in previous catalogues | Evaluate the appropriate KT8 or TH8 configuration | This changes from a 6-inch to an 8-inch chart format; check installation space and consumables |
Before ordering: send us a photograph of the existing instrument label, its probe and the chart paper reference. If your procedure requires 31-day recording, highlight this specifically: the current 8-inch range lists 24-hour and 7-day chart rotation.
Other Current Temperature Configurations
A replacement does not always need to use the same sensing technology. Depending on the application, the current range also includes:
- KT8-20: single-channel thermistor temperature measurement
- KT8-21: dual-channel thermistor temperature measurement
- KT8-40: platinum RTD temperature measurement
- KT8-50: ambient temperature measurement
Select the sensor and recorder together. A suitable measurement range alone does not establish compatibility with an existing probe or installation.
Charts, Pens and Calibration
- Chart paper: match the recorder, measurement scale, units and recording duration.
- Pens: confirm the correct pen set and channel arrangement.
- Calibration: specify the required measurement points and documentation.
- Installation: check mounting space, power supply and sensor placement.
Charts are sold separately. Confirm the instrument configuration and required consumables together when requesting a quotation.
Prefer Electronic Records?
If you want to save and review readings electronically, explore our temperature and humidity data loggers.
For centralised monitoring across multiple locations, see the Vaisala viewLinc continuous monitoring system. Tell us how you need to collect, review and retain your records so we can help compare the options.
Need Help Replacing a Dickson Recorder?
Contact Seacom Process Instruments with your existing model number, measurement range, probe details and chart reference. We will help review a suitable configuration and confirm availability.
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