Quick view Kitagawa America Kitagawa Gas Detector Tubes (10 per box) - Formaldehyde-Indoor Air Quality Compare $150.00 Kitagawa Gas Detector Tubes Each Kitagawa Detector Tube is formulated with high purity reagents that absorb and react with the target gas or vapour being measured. A colorimetric stain is created that is proportional in length to the concentration. For... Choose Options Choose Options