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| Hygrometers |
| Hygrographs |
These instruments record, on a circular drum with an ink trace, the relative humidity or temperature and are used when paper records have to be kept.
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2500.325QS |
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Hygrograph
A hygrograph uses a length of hair to record changes in humidity. Operating range 0 to 100% RH at an accuracy of +/- 3% between 20 and 100% RH. It is fitted with either a clockwork motor, or a quartz clock switchable between one, seven or 31 day drum rotation.
290mm (12”) x 145mm (6") x 190mm (7 1/2")
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2500.425QS |
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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. It is fitted with either a clockwork motor or a quartz clock, switchable between one, seven or 31 day drum rotation. Operating ranges 0 to 100% RH, -15°C to 65°C.
290mm (12") x 145mm (6") x 260mm (10")
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2500.2010 |
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Thermohygrograph
This model is fitted with a battery-powered quartz clock for seven day rotation. Operating ranges 20 to 100% RH and -16° to 40°C.
240mm x 150mm x 150mm
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