1620 "The DewK"
Thermo-Hygrometer

Model #1620A/1621A

Superior accuracy
NEW! Network enabled
Powerful logging and analysis tools
Two interchangeable calibrated sensors
Huge memory
Upgraded software

From: To Order

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At ThermoWorks we recommend calibration equipment we use in our lab like the 1620 Dewk Thermo-Hygrometer. It's a fully loaded lab quality temperature and humidity recorder with ethernet and wireless capabilities for data convenience.

The standard-accuracy sensor ("S" model) reads temperature to ± 0.25°C over its calibrated range of 15 to 35°C. Relative humidity readings are to ±2%RH from 20 to 70%RH. All DewK sensors come with NVLAP accredited certificates of calibration for both temperature and humidity, complete with data and NIST traceability.

The DewK gives you all the communications options you expect, and then some. With its built-in Ethernet RJ45 jack, multiple DewKs can be monitored from the same screen using LogWare III client-server software. Ethernet also gives you the possibility for remote connectivity over the internet, so you can monitor critical conditions while you're away. With an RF modem the Dewk can transmit wirelessly up to 100 ft away.

In addition to temperature and humidity, the DewK calculates dew point, heat index, and rates of change for both temperature and humidity, without the need to buy additional software. Min, max, and a variety of other statistics are also calculated and can be shown on-screen. Daily summary statistics, including min, max, and maximum rates of change are stored for the most recent sixty days.

With the DewK you get two for the price of one. Having inputs for two sensors, each measuring both temperature and relative humidity, one DewK can monitor two locations at the same time. Both sensors can be run via extension cables to remote locations up to 100 feet away, or one sensor can be directly mounted to the top of the DewK.

Each sensor is calibrated for both temperature and humidity. The calibration constants assigned to the sensors reside in a memory chip located inside the sensor housing, so sensors may be used interchangeably between different DewKs, and the recalibration of sensors doesn't require an accompanying DewK.

The DewK has enough on-board memory to store up to 400,000 date- and time-stamped data points. That's two years' worth of data for both measurements from two sensors if readings are taken every ten minutes!

Alarm settings can be set up quickly in the DewK based on temperature, the rate of change in temperature, RH, the rate of change in RH, and instrument fault conditions. Alarms can be both visual (flashing display) and audible (beeping). Likewise, alarm settings can be set up and events triggered in LogWare III. The DewK is also equipped with a 0 to 12 volt alarm output that can trigger a process control system.

Up to sixteen different display setups can be stored and recalled at the touch of a single button. And all 16 can be easily modified, so you get exactly what you want. Call ThermoWorks today to order your Dewk for your lab.

Environmental Range -32 to 122 F / 0 to 50°C ;
0 to 100% RH
Calibrated Temperature Accuracy ("S" Model) ±0.45°F from 59 to 95 °F / ±0.25 °C from 15 to 35°C
Calibrated RH Accuracy ("S" Model) ±2%RH from 20 to 70%RH
Expected Extrapolated Performance (Uncertified) ±0.9°F / ±0.5°C outside calibrated range
±3%RH outside calibrated range
Delta Temperature Accuracy ±0.045°F for ±1° changes within 59 to 95°F /
±0.025°C for ±1° changes within 15 to 35°C
Delta Humidity Accuracy ±1.0%RH for ±5% changes within 20 to 70%RH
RH Resolution User selectable up to 0.01% on front-panel display (0.1% recorded)
Inputs Up to two sensors, measure temperature and relative humidity, detachable, cable-extendable, interchangeable, self-contained calibrations, may be assigned unique 16-character identifications
Display 240 x 128 graphics monochrome LCD, displays password-protected temperature/humidity data graphically, numerically, and statistically (one or both channels); 16 pre-defined, user-changeable screen setups
Memory 400,000 typical individual date/time-stamped readings
Alarms Password-protected visual, audible, and external alarms for temperature, temperature rate, RH, RH rate, and fault conditions
Alarm Port Output 2.5 mm two-conductor subminiature plug, 0 V normal, 11 to 12 V active, sources up to 20 mA
Connectivity Ethernet, RS-232, RF (optional)
Ethernet RJ45 jack, 10 Base-T or 100 Base-TX; static or dynamic (DHCP client) IP address assignment
Certificate Includes Certificate of Conformance
Web Page Embedded web page interface features: instrument identification, measurements, password-protected terminal page; can be disabled
Wireless Option Requires wireless modem. 802.15.4 (underlies Zigbee), 2.4 GHz frequency, 1 mW transmit power, 30 m (100 ft) typical unobstructed range; can be disabled
Mounting Wall mounted (hardware included) or set on a bench top
Power 12 V dc from external 100 to 240 V dc power supply
Battery Backup Standard 9 V battery enables continued measuring during power disruptions
Size (DewK) (HxWxD) 4.9 x 8.3 x 2.0 in / 125 x 211 x 51 mm
Size (Sensors) (LxDia) 3.1 x 0.75 in / 79 x 19 mm
Weight 1.5 lb / 0.7 kg
Calibration Certificate of NIST-traceable NVLAP accredited temperature and humidity calibration included; As Found and As Left data supplied at three temperature points and three humidity points each at 20 °C (68 °F); Complies with NCSL/ISO/IEC 17025:2000 and ANSI/NCSL Z540-1-1994
LogWare III
(Optional Software)
Requirements include: Microsoft® Windows® 2000 (SP4) or XP (SP2) operating system, IBM compatible Intel Pentium® IV 1 GHz PC processor or better, 512 Mb RAM (1Gb or more recommended), 200 Mb HDD space for installation (additional free space recommended for data storage), CD-ROM drive for installation

 


Graphical & Statistical Data
The DewK lets you view data just about any way you like it. Both graphical data and statistical data can be shown for temperature and humidity from one or two inputs. Modifying any of the standard screens is easily done, so you see exactly what you want—no more, no less.

LogWare III Software
If you really want to get the most out of your DewK, LogWare III is an investment worth every penny. As client-server or stand-alone software, it remotely monitors and logs an unlimited number of concurrent log sessions into a single database. That means data from many DewKs can be managed in real time via Ethernet, RS-232, or wireless connections.

Cal Cert

Temperature Log Book

Model: TLOG1

  • 6" x 9", 36 pages
  • Meets HACCP requirements
  • Includes calibration log
Quick and easy way to keep temperature records. Records date, time, item or location, temperature, comments or actions, and initials. Tips and reference temperatures are provided as well as simple instructions to check a thermometer's calibration.


Cal Cert

NIST-Traceable RH Calibration

Model: CAL-RH1PT

  • 1-Point: 40%
  • Lab calibration using certified RH sources
1-point RH calibration performed in ThermoWork's NIST-Traceable calibration lab. Includes calibration report and actual test data.


Cal Cert

NIST-Traceable RH Calibration

Model: CAL-RH2PT

  • 2-Points: 30%, 60%
  • Lab calibration using certified RH sources
2-point humidity calibration performed in ThermoWork's NIST-Traceable calibration lab. Includes calibration report and actual test data.


Cal Cert

NIST-Traceable RH Calibration

Model: CAL-RH3PT

  • 3-Points: 20%, 50%, 80%
  • Lab calibration using certified RH sources
3-point humidity calibration performed in ThermoWork's NIST-Traceable calibration lab. Includes single temperature at ambient, calibration report and actual test data.

To Order
1620A-S The DewK Thermo-Hygrometer, includes one standard-accuracy sensor, wall bracket, and RS-232 cable.
1621A-S The DewK Thermo-Hygrometer Kit, includes two standard-accuracy sensors, wall bracket, RS-232 cable, 25 ft sensor extension cable, sensor wall bracket, sensor case, and 9936A LogWare III software single-PC licence.
2626-S Spare Sensor, standard accuracy
2627-S Spare Sensor Kit, (includes high-accuracy sensor, sensor case, sensor wall mount bracket, and 25 ft / 7.6m extension cable)
2628 Cable, Sensor Extension, 25ft / 7.6m
2629 Cable, Sensor Extension, 50ft / 15.2m
9936A LogWare III Software(single license)

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