7 Hygrograph Chart

Russell Scientific No. 7 is a hygrograph chart designed for recording humidity over a 7 day period. Printed in red and measuring 302mm x 92mm, each pack contains 100 charts, providing 2 year's worth of monitoring.

Traditional non-adhesive hygrograph charts ideal for recording drums that have a clip to hold the chart in place. If your drum recorder does not have a clip we suggest using our chart tape to hold the sheets in place.