![]() This machine uses advanced biometric technology, such as fingerprint and facial recognition, to record employee attendance, providing a secure and accurate way of tracking employee time. One solution to this problem is the implementation of a biometric attendance machine, such as the eSSL Iclock990+ID. In today’s fast-paced business environment, it is important for companies to have accurate and efficient ways of tracking employee attendance. “Streamlining Attendance Tracking: The eSSL Iclock990+ID Biometric Attendance Machine” With continuous generation of a nominal 50 %RH at 21 ☌, the reservoir will last about two weeks between refills.Best Biometric Machine for industries. Depending on the temperature and humidity being generated, the 2500 may operate continuously from hours to months. Hygrometer is in thermal equilibrium with its environment perform operational checks of the heat pump and optical components before and after mirror cleaning and balancing determine whether the hygrometer is controlling the mirror deposit in the liquid phase or ice phase when operating at dew and frost points below 0 ☌ determine if the hygrometer is correctly calculating other humidity parameters determine the hygrometer's repeatability, stability, and drift characteristics.Įnvironmental Testing: The 2500 can serve as a test bed for evaluation and R&D of humidity sensors, humidity sensing systems, and humidity sensitive products, e.g., polymers, composites, film, magnetic medium, blood gas analysis, pharmaceuticals, soil hydrology, consumables, electronics, optics, etc. Humidity Sensors And Chart Recorders: Insert humidity probes through the two inch port in the side of the chamber or place hygrothermographs into the chamber and you can: determine humidity calibration accuracy and characterize humidity sensitivity by subjecting the sensing system to a variety of humidity levels perform operational checks such as the sensing systems capability to correctly calculate and display other humidity parameters determine the repeatability, stability, hysteresis, and drift characteristics of various humidity sensing systems.Ĭhilled Mirror Hygrometers: Install the actual chilled mirror head into the chamber or insert a sample tube through the test port and draw a sample through the chilled mirror head and you can: verify mirror temperature measurement accuracy (calibration) when the The output of the device under test may then be compared with the generator's printed data for analysis. Virtually any humidity and temperature point may be generated, for any length of time, within the operational limits of the generator. The fluid jacketed test chamber can accommodate humidity sensors, hygrothermographs, chilled mirror hygrometers, and various material samples for environmental testing. Uncertainty for relative humidity is not specified below 0 ☌.Ģ When operated at temperatures within 10 ☌ of room ambient temperature.ģ Traceable to the International System of Units (SI) through the National Institute of Standards and Technology (NIST) recognized through CIPM MRA.Įlectrical Power For ST Model: (Optional)Ĭlean Oil Free Instrument Air 175 psiG & 20 L/min Pre-Saturator/Expansion Valve Temperature Uncertainty: 1ġ5" H x 15" W x 12" D (38.1 cm x 38.1 cm x 30.5 cm)Ģ2" H x 36" W x 23" D (55.8 cm x 91.4 cm x 58.4 cm)ģ3.25" H x 43" W x 26" D (84.5 cm x 109.2 cm x 66.0 cm)ĥ6" H x 43" W x 26" D (142 cm x 109 cm x 66 cm)ġ Represents an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%. ![]() Relative Humidity Uncertainty: P c T c 1Ĭhamber Fluid Temperature Range: (Optional)Ĭhamber/Saturation Temperature Uncertainty: 1 Precision humidity generation is determined by the accuracy of the pressure measurements and on the accuracy and uniformity of temperature throughout the generating system. ![]() Humidity produced is solely dependent on the measurement of pressures and temperatures and does not rely on any other device (such as a dew point hygrometer, psychrometer, or humidity sensor) for the measurement of water vapor content. ![]() To generate a known humidity, the computer controls the pressure ratio Pc /Ps utilizing the enhancement factor ratio fs/fc and the effective degree of saturation es/ec. Relative humidities are calculated from the measurements of pressure and temperature with the formula: Humidity setpoint values are input by the operator from the front panel keypad and are limited only by the range of the 2500 humidity generator. Simply apply power and the 2500 will power-up ready to generate. This system is capable of continuously supplying accurately known humidity values for instrument calibration, evaluation, and verification, as well as for environmental testing. The Model 2500 Benchtop Humidity Generator is a self contained system capable of producing atmospheres of known humidities using the fundamental, NIST proven, "two-pressure" principle.
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