Temperature / Humidity Recorders

Use our thermohygrographs whenever you need a record of humidity and temperature conditions. Just put them in place and start recording, no connections, not even a power cord.

That's faster, easier and likely less expensive than electronic instrumentation and data loggers. Because we can supply them with traceable humidity and temperature certification and these recorders are easily transported to our Toronto plant for re-certification they may be ideal to meet your QA requirements.

Applications include laboratories, clean rooms, museums, librairies, warehouses, environmental chambers and humidity sensitive production areas. The sensing elements are located inside a sturdy housing, well protected from mechanical damage.

Since the transmission mechanism has minimal friction and is insensitive to shocks and temperature changes, correct readings of atmospheric conditions are guaranteed. An aged circular bimetal is used to guarantee precise temperature measurement.

The radius change of this bimetal with temperature is transmitted through a lever system to the recording pen. The humidity sensor is a ''harp" of human hair,"H", or proprietary plastic fibres,"K", whose length changes with humidity. The changing length is transmitted through a lever system to the recording pen. "K" elements are maintenace free and give 3% accuracy. "H" elements require weekly excurtions to 95% to give 2% accuracy.

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