Description
Dickson TH8-7F Temperature Humidity Chart Recorder -20 to 120°F For Parts
The Dickson TH8-7F is a portable, battery-powered circular chart recorder that continuously logs both temperature and humidity on a single 8-inch chart. It uses two recording pens — one for temperature, one for relative humidity — driven by a clock mechanism that advances the chart over a 7-day cycle. This unit is being sold as-is for parts or repair; the pens are dried out and the recorder could not be tested.
Specifications & What's Included
- Model: TH8-7F
- Serial Number: 03017788 (internal reference)
- Temperature range: -20 to 120°F
- Humidity range: 0 to 100% RH
- Chart: 8" circular, 7-day rotation
- Compatible chart: Dickson C417 (8", -20/120°F, 0/100% RH, 7-day)
- Dual recording pens: blue (humidity) and red (temperature) — both dried/unusable
- Power: battery-operated (batteries not included)
- Country of manufacture: USA
- CE marked
- Chart paper: not included
- Carrying handle integrated into housing
Applications
The Dickson TH8 series of circular chart recorders has been used for environmental monitoring in laboratories, cleanrooms, cold storage facilities, warehouses, pharmaceutical storage areas, and museum/archival environments where a continuous written record of temperature and humidity conditions is required. These portable, self-contained units were widely used from the 1980s through the 2000s in facilities that needed a low-cost, paper-based audit trail of environmental conditions — particularly in applications with regulatory or compliance requirements such as food storage, pharmaceutical cold chains, and ISO-certified manufacturing. The 7-day circular chart format provides a clear visual history of environmental fluctuations without requiring any electronics or data download. While digital data loggers have largely replaced paper chart recorders in new installations, many facilities continue to maintain and repair existing Dickson units, and the TH8-7F remains a commonly sought platform for parts including the case, chart mechanism, recording arms, and clock drive.
This Dickson TH8-7F Temperature & Humidity Chart Recorder is being sold as-is for parts or repair. The pens are dried out and unusable — visible dried ink residue is present on the chart surface in the photos. We were unable to test this unit. No chart paper is included, and batteries are not included. The housing and mechanical components appear intact with normal wear for the age of the unit. This recorder is a good source of parts including the case, chart mechanism, recording arms, and internal components. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Dickson |
Model: |
TH8-7F |
MPN: |
TH8-7F |
Type: |
Temperature & Humidity Circular Chart Recorder |
SKU: |
18217 |
Temperature Range: |
-20 to 120°F |
Humidity Range: |
0 to 100% RH |
Chart Size: |
8" circular |
Chart Part Number: |
C417 |
Chart Duration: |
7-day |
Power Source: |
Battery |
Country/Region of Manufacture: |
United States |
Condition: |
As-Is / For Parts or Not Working |
Seller Notes: |
Sold for parts. Pens dried/unusable. No chart paper. Batteries not included. Unable to test. |
Form Factor: |
Portable / Handheld Case |
Serial Number (Internal): |
03017788 |
Application / Use Case: |
Environmental monitoring, lab, cleanroom, cold storage |
Condition Notes: |
Dickson TH8-7F Temp/Humidity Chart Recorder sold AS-IS for parts. Pens dried and unusable. No chart paper. Batteries not included. Unable to test. Housing intact with normal wear. Good parts unit. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
