425, 425S, 425QS Thermohygrograph

A thermohygrograph records air temperature and relative humidity on a continuous basis. It is used to monitor the optimum temperature and humidity where these factors are important.
Technical data
measuring element         temperature
bimetal                        -35°C to 45°C  +/- 0.5K  (Model 425)
                                     -15°C to 65°C  +/- 0.5K   (Model 425S & 425QS)
Measuring element         air humidity 
Hair                       0 to 100% +/-  3% at 20...100% rh

It is fitted with either a quartz clock or a clockwork motor, switchable between one, seven or 31 day drum rotation. Please specify choice when ordering.

Mechanical drum clock  acc. to Din 58658
revolution cycle            Model   425 & 425S          day 25.6h
                                                                       week 176h
Electronic Quartz clock
revolution cycle              Model 425QS                day 25.6h
                                                                       week 176h
                                                                       month 783h
Please specify clock type when ordering.

Recording drum
drum material: plastic
chart paper holder material: brass nickel plate
diameter 93.3mm
high       186mm
write range 80mm for each measuring element.
Accessories:
60 sheets of week chart paper
4 fibre pens
Battery Mignon (AA) 1.5V (R6) (for electronic quartz clock)

Dimensions
Length 290 x breath 145 x height 260mm
weight 3.15kg
Please Contact us for price.

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