Cole‑Parmer Three‑Speed, Battery‑Operated Hygrothermograph

Cole‑Parmer Three‑Speed, Battery‑Operated Hygrothermograph

This three‑speed hygrothermograph provides reliable, continuous chart‑recorded temperature and humidity tracking for laboratories, storage areas, cleanrooms, and environmental monitoring stations. Select 1‑, 7‑, or 32‑day chart rotation with a simple switch. A flashing LED confirms operation, and the quartz‑controlled drive mechanism maintains constant rotation even as batteries weaken.

Includes

• Two felt‑tipped pens (one blue, one red)
• One 7‑day sheet of chart paper
• Two C batteries

Key Features

• Selectable 1‑, 7‑, or 32‑day recording periods.
• Quartz‑controlled drive maintains constant rotation even with weak batteries.
• Battery‑condition test button.
• Human‑hair bundle humidity sensor and aged bimetallic temperature sensor.
• 1‑year warranty.

More About This Item

This hygrothermograph uses a human‑hair bundle humidity sensor and an aged bimetallic strip temperature sensor for dependable chart‑recorded environmental monitoring. Response time is approximately 15 minutes for 45% of the reading. Two C batteries (included) power the unit for up to six months of continuous operation.

Exposure to RH levels above 90% may cause a temporary decrease of 7–10% RH across the range due to hair‑bundle elongation; normal readings return within approximately three weeks once humidity drops below 80%.

Specifications

• Chart Type: Drum
• Chart Speed: 24‑hour; 7‑day; 32‑day (user selectable)
• Chart Width: 6.625 in
• Chart Length: 11.5 in
• Temperature Range: 14 to 122°F (‑10 to 50°C)
• Temperature Accuracy: ±1.8°F (±1.0°C)
• Humidity Range: 5 to 95% RH
• Humidity Accuracy: ±3% from 10–90% RH; ±5% from 5–9% RH
• Width: 13‑1/4 in (33.7 cm)
• Height: 11‑1/2 in (29.2 cm)
• Depth: 5‑37/64 in (14.2 cm)
• Battery Type: Two C batteries (included)
• Battery Life: 6 months
• Description: Three‑Speed, Battery‑Operated Hygrothermograph
• Warranty: 1 year