Delmhorst RH/TK/33 (33%) Relative Humidity Test Kit Sebo which is why this light

which is why this light needs a properly darkened room to work well

Sprayers left loaded between jobs are much harder on it than sprayers emptied and rinsed

Actichem Perox

Economical to use - dilute at 32:1 -1 litre of concentrate will clean up to 320 square metres of carpet

so it ships unregulated

Delmhorst RH/TK/33 (33%) Relative Humidity Test Kit Sebo which is why this lightThe relative humidity test kit is great for testing the accuracy of our detachable RH T S1 relative humidity sensors. The air inside the test kit bottle is controlled by a salt solution, which keeps the relative humidity constant. The kit is available with either 33% relative humidity Order as RH TK 33 respectively