Hygrometers

This instrument measures relative humidity and air temperature. The large, easy to read backlit LCD includes prmary and secondary displays. Supplied complete with carry case, instruction manual and battery.

• Humidity measurement from 0.2%RH to 100%RH with 0.1%RH resolution and fast time response
• K-Type thermocouple for wide temperature measurements of -20 to 1000°C&°F
• °C&°F switchable
• Date hold and max hold functions
• Auto power off
• Low battery indicator

Humidity - 5 to 98%RH - +/- 3.5%RH
K Type Thermometer - -20 to 1000°C&°F - +/-(3%reading +4°C/7°F)

Response Time: 3 minutes
Sampling Rate: 2.5 samples/second
Meter Dimensions: 170 x 85 x 40mm
LCD Dimensions: 57 x 47mm
Probe Dimensions: 165 x 23 x 17mm
Weight: 210g
Battery: 1 x 9v

A digital instrument which has been designed to combine the functions of a thermometer and a humidity meter with dew point indicator. It is ideal for use in science, industry and engineering and comes complete with carry case, instruction manual and battery.

• Fast response time
• Dual display temperature and humidity
• High accuracy
• Date hold and Max hold functions
• Micro processor based design
• Auto power off and low battery indication
• Backlight

Function
Humidity - 0 to 100% RH - +/-2%RH
Temperature - -30 to 100°C&F - +/-0.5°C
Dewpoint Temp. - -30 to 100°C&F - +/-0.5°C
Wet Bulb Temp. - 0 to 80°C&F - +/-0.5°C

Response Time: %RH: 10S (90% at 25°C still air)
Sampling Time: 2.5 samples/second
Dimensions: 225 x 45 x 34mm
LCD Dimensions: 25 x 27mm
Weight: 200g
Battery: 1 x 9v

A 4 in 1 Multi-Function Environment Meter which has been designed to combine the functions of sound level meter, light meter, humidity meter and thermometer and is ideally suited to a variety of practical applications for professional and home use.

The sound level function can be used to measure noise in factories, schools, offices, airports, home etc, checking acoustics of studios, auditoriums and hi-fi installations. The light function is used to measure illuminance in the field. It is fully cosine corrected for the angular incidence of light. The light sensitive component used in the meter is avery stable, long life, silicon diode.

The humidity/temperature is taken by a semi-conductor sensor and K type thermocouple.

Sound Level Meter - 35 to 130dB - +/-3.5dB at 94db
Light Meter - 20, 200, 2000, 20'000lux - +/-5% reading +10 digits
Humidity Meter - 25% to 95% RH - +/-5%RH (at 25°C, 35% to 95% RH)
Thermometer -
-20 to 750°C&°F -
+/-3% reading +/-2°C (-20 to 200°C)
+/-3.5% reading +/-2°C (200 to 750°C)

Measuring Rate: 1.5 times per second, nominal
Resolution: 0.01Lux, 0.1°C&°F, 0.1%RH, 0.1dB
Dimensions: 251 x 63.8 x 27mm
Photo Detector Dimensions: 115 x 60 x 27mm
LCD Dimensions: 50 x 30mm
Weight: 330g
Battery: 1 x 9v

The classic masons pattern wet and dry bulb hygrometer with a large water reservoir. One thermometer bulb is in air and the other is wrapped in a wick kept moist from a water resevoir. The difference between the two readings is used to give an accurate calculation of humidity. Complete with wet and dry bulb tables.

A traditional hair hygrometer design.

An aspirated, whirling hygrometer in durable plastic, comes with sturdy box and laminated set of tables.
Celcius reading mercury tubes.

A simple and convenient instrument with the conversion table slide rule incorporated into the the instrument.
Celcius reading mercury tubes.