Calibration Parameter: Dew point, Frost point, RH%, PPM

Traceable to: NIST / SI

Calibration Range: Dew point（-90—+20℃）

Frost point（-95—0℃）

RH（10 to 98% @ 0-70℃）

PPM（0.5 to 100,000 ppmV）

Dew Point Hygrometer

• Dual mirror temperature sensors
• Removable mirror module for calibration in liquid
• Heated measuring heads and sampling systems
• High pressures up to 20000 kPa
• Temperature controlled sampling system
• Fast response
• Touch screen full color LCD user interface

Specifications

Measuring Ranges

Frost/Dew Point: -95...20 °C

Temperature: -50...100 °C

Sample pressure: 500...2’000 hPa abs.

Accuracy

Frost/Dew point (for calibrated range): ≤±0.1°C

Temperature: ≤±0.07°C

Reproducibility

Frost/Dew point: ≤±0.05°C

Temperature: ≤±0.04°C

Standard Features

Digital I/O: RS-232

Mirror cooling: 3-stage Peltier thermoelectric

Mirror temperature sensors: Dual Platinum Resistance Thermometer PRT (Pt-100)

Analog outputs: Two analog outputs, user programmable, -10...+10 V and 4...20 mA

Gas connections: VCR Cajon 1/4’’

Sample gas flow rate: 0...2 l/min

Sample gas circuit: Stainless steel, 316 / 316L, electro polished

Cooling: Refrigeration

ORIS: Yes

Internal pump: Optional

Generator

• Traceable to NIST
• Based on NIST Proven Two-Pressure Principle
• Push Button (Keypad) Control
• Automated Control of User Setpoints
• ControLog® Automation Software
• HumiCalc® with Uncertainty Software
• Automatically Applies Enhancement Factors
• Computerized Internal Transducer Calibration
• Timed/Formatted Output to Printer
• Battery Backed-up Real Time Clock
• Backlit Liquid Crystal Display

Specifications

Frost / Dew Point Range: –95 to +10 °C

Frost / Dew Point Uncertainty: (–95 to –90 °C) 0.9 °C

(–90 to –80 °C) 0.5 °C

(–80 to –70 °C) 0.2 °C

(–70 to 10 °C) 0.1 °C

Parts Per Million Range: 0.05 to 12000 PPMv

Relative Humidity Range: 0.0002 to 50%

Saturation Pressure Range:Ambient to 300 psiA

Saturation Pressure Uncertainty (10-50 psiA): 0.05

Saturation Pressure Uncertainty (50-300 psiA): 0.30

Saturation Temperature Range: –80 to +15 °C

Saturation Temperature Uncertainty: 0.08 °C

Saturation Temperature Heating/Cooling Rate: 2 Minutes Per °C Average

Gas Flow Rate Range: 0.1 to 5 L/min

Gas Flow Rate Resolution: 0.02 L/min

Gas Type: Air or Nitrogen

Gas Pressure Rating (MAWP): 350 psiG

Test Port: 1/4 Inch Swagelok® Tube Fitting (6.35mm)

Gas Supply (External): 350 psiG, 5 L/min

Applications

Used by NIMI, EPRI and academic institute for calibrating hygrometer

Used by dew point instrument manufacturers, humidity sensor and vapor content meter manufacturers for calibrating