Description
Product Overview
Thomas Scientific replacement pens are designed for circular chart recorders, ensuring precise tracking of temperature and humidity data. These pens feature durable construction with dimensions of 8.5 x 8.5 x 0.4 inches and a weight of 10.56 ounces, model number C477. Manufactured by Thomas Scientific, they are compatible with various recording devices and include an AC adapter for seamless operation. First available on March 31, 2015, these pens rank highly in industrial and scientific categories, specifically #12 in Circular Chart Recorders.

Usage
These replacement pens are ideal for industrial facilities, laboratories, and research centers where continuous monitoring of environmental conditions is critical. They are used in HVAC systems, pharmaceutical storage, food processing, and climate-controlled environments to maintain accurate records. Target users include technicians, engineers, and scientists who rely on dependable data logging for compliance and quality control.
Why Choose Us
Thomas Scientific replacement pens offer superior reliability and compatibility, backed by the manufacturer’s reputation for quality industrial and scientific supplies. They ensure consistent ink flow and minimal maintenance, reducing downtime in critical applications. The inclusion of an AC adapter enhances convenience, making them a cost-effective solution for long-term use.
Key Features
- Precise recording for temperature and humidity data
- Durable construction with standard dimensions for easy compatibility
- Includes AC adapter for reliable power supply
- Easy replacement design minimizes setup time
- Trusted brand with high rankings in industrial categories
FAQ
What chart recorders are these pens compatible with?
These replacement pens are designed for circular chart recorders, particularly models that accept standard pen types like the C477. Check your recorder’s specifications for compatibility.
How often should I replace the pens?
Replacement frequency depends on usage intensity, but typically every few months under continuous operation. Monitor ink levels to ensure accurate recordings.
Does the product come with installation instructions?
Yes, basic guidance is provided, and the pens are designed for straightforward installation into compatible chart recorders.
Can I use these pens for both temperature and humidity?
Yes, they are versatile and suitable for recording either temperature, humidity, or both, depending on your chart recorder’s setup.
Is the AC adapter included in the package?
Absolutely, the AC adapter is included to support uninterrupted operation of your recording equipment.




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