These minidrum hygrothermographs are small, compact and utilize virgin blonde hair bundles as the RH sensor. Aged bimetallic strips indicate temperature changes.

A. Low-Profile Minidrum Hygrothermograph
This low-profile hygrothermograph is perfect when space is at an absolute minimum. Use inside fume hoods, environmental chambers or areas with little bench space. Quartz controlled crive mechanism rotates the drum at a constant speed. Unit will operate for approximately 6 months on one AA battery (included). Sensors are coupled to the pens through a mechanism of levers. Purchase 4104V for spare paper.

B. Mini-Cube Hygrothermograph
The mini-cube, while slightly larger than the low-profile model, still offers a small dimensional size for labs and environments where space is minimal. Quartz controlled motor provides accurate rotation for constant speed. Motor will operate up to 6 months on one AA battery (included). Acrylic cover latches securely. Purchase 4104T for spare paper.

Both units come complete with two felt-tipped pens (blue and red), one pack of 7-day sheet of chart paper, one AA battery.

SPECIFICATIONS
Temperature Range	22 to 104°F (–6 to 40°C)
Temperature Graduations	2°F (2°C)
Temperature Accuracy	±3.6°F; ±2°C
Humidity Range	5 to 90% RH
Humidity Accuracy	±5% from 20 to 90% RH
	±7% from 5 to 20% RH
Humidity Graduations	5% RH
Chart Size	3 7/10H x 8 1/5"L
Chart Rotation	7 days
Dimensions	4104B: 7 1/2H x 5"dia
	4104C 6H x 7 2/5W x 3 9/10"D.
Shipping Weight	4104 B: 4lb, 4104C: 5 lb