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Handheld Hygro Thermometer Data Logger


Item# RH318

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $325.50
5-9 $309.22
10-24 $302.72
25-49 $289.70
50-99 $283.18
100+ $276.68

In stock

Lead Time ( If not in Stock): 2 weeks

Handheld Hygro Thermometer Data Logger RH318 RH318
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  • Thermistor Sensor for Temperature Measurement, Fast Response Time
  • Large Backlit Dual LCD Display, MAX/MIN/HOLD Function
  • Dew Point Measurement
  • 16,000 Record Data Logger
  • USB Cable Included, RS232 Cable (Optional)
  • Interchangeable Probes
  • Windows® Software
  • Auto Power Off
  • Low Battery Indicator
  • Tilt Stand Included
5 Year Warranty

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Form Factor
Response Time
Maximum Temperature Measurement
Display Type

Product Specs

  • Accuracy Value <10% RH
  • Auto Power Off Yes
  • Batteries Included Yes
  • Battery Life Approx. 80 hours
  • Battery Type Alkaline
  • Maximum Ambient Temperature 40°C (104°F)
  • Maximum Humidity Measurement 100% RH
  • Maximum Dew Point 60°C (140°F)
  • Maximum Storage Temperature 60°C (140°F)
  • Minimum Ambient Temperature 0°C (32°F)
  • Minimum Storage Temperature -10°C (14 °F)
  • Minimum Humidity Measurement 0% RH
  • Sampling Rate Two times per second
  • Temperature Resolution 0.1% RH

The RH318 is a low cost, high performance handheld meter with data logging ability. It offers a large dual back-lit display to show the temperature and humidity from a handheld probe and can display a dew point measurement. The temperature/humidity probe uses a semiconductor and polymer capacitive sensor and a thermistor temperature sensor. Windows® based software and USB interface cable is included to allow real time or recorded data to be read by a PC through the USB/RS232 port (RS232 interface cable is optional). Probe can extend up to 1.5 m (5') with optional extension cable.

Sensor Type: Electronic capacitance polymer film sensor/NTC
Relative Humidity Range: 0 to 100% RH
Temperature Range: -20 to 60°C (-4 to 140°F)
Dew Point Temperature Range: -20 to 60°C (-4 to 140°F)
Resolution: 0.1% RH, 0.1°C, 0.1°F
Accuracy Probe (RH318-RP): <10% RH, >90% RH ±4.0% RH 10% RH to 90% RH ±2.0% RH -20 to 60°C (-4 to 140°F) ±0.8°C (±1.5°F)
Response Time (In Slow Moving Air):
180 s
Temperature: 10 s
Sensor Hysteresis: <1.5% RH
Temperature Coefficient: 0.1 x (specified accuracy) per 1°C (<23°C or >23°C)
Sample Rate: Two times per second
Battery Type: 9V battery (included)
Battery Lifetime: Approx. 80 hours (alkaline battery)
AC Adaptor (Optional): 9 Vdc (8 to 10 Vdc max )
Operation Temperature: 0 to 40°C (32 to 104°F)
Operation Humidity: 10 to 90% RH
Storage Temperature: -10 to 60°C (14 to 140°F)
Storage Humidity: 10 to 75% RH
185 L × 65 W × 36 mm H (7.3 x 2.6 x 1.4")
Probe: 15 D x 94 mm L (0.6 x 3.7")
Weight: Approx. 285 g (10 oz)
Environment Conditions:
Altitude: Up to 2000 m (6562')
Relative Humidity: 90% max
Operation Ambient Temperature: 0 to 40°C (32 to 104°F)

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Handheld Hygro Thermometer Data Logger
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AC adaptor (115 - 240V)
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RS232 interface cable (spare
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USB interface cable (spare)
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