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Datasheet generated 2026-10-07
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Fluke Calibration 1620A Precision Thermo-Hygrometer

Fluke · Safety & Detection · Tools · USA · fluke.com
Part Number
2723991  ·  HS 9025.80
Fluke Calibration 1620A Precision Thermo-Hygrometer

The DewK measures temperature to ±0.125 °C and humidity to ±1.5% on two channels, and displays it on a big, clear screen.

Technical Specifications

Manufacturer part number (MPN)2723991
BrandFluke
CategoryTools
Operating range0°C to 50°C (32°F to 122°F); 0% RH to 100% RH
Calibrated temperature Accuracy±0.25°C from 15°C to 35°C (±0.45°F from 59°F to 95°F)
Calibrated RH accuracy±2% RH from 20% RH to 70% RH
Expected extrapolated performance (uncertified)±0.5°C (±0.9°F) outside calibrated range ±3% RH outside calibrated range
Delta temperature accuracy±0.025°C for ±1° changes within 15°C to 35°C (±0.045°F for ±1° changes within 59°F to 95°F)
Temperature resolutionUser selectable up to 0.001°C/°F on front-panel display (0.01° recorded)
Delta humidity accuracy±1.0% RH for ±5% changes within 20% RH to 70% RH
RH resolutionUser selectable up to 0.01% on front-panel display (0.1% recorded)
InputsUp to two sensors, measure temperature and relative humidity, detachable, cable-extendable, interchangeable, self-contained calibrations, may be assigned unique 16-character identifications
Display240 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
Memory400,000 typical individual date/time-stamped readings
AlarmsPassword-protected visual, audible, and external alarms for temperature, temperature rate, RH, RH rate, and fault conditions
Alarm port output2.5 mm two-conductor subminiature plug, 0 V normal, 11 to 12 V active, sources up to 20 mA
ConnectivityEthernet, RS-232, RF (optional)
EthernetRJ45 jack, 10 Base-T or 100 Base-TX; static or dynamic (DHCP client) IP address assignment
Web pageEmbedded web page interface features: instrument identification, measurements, password-protected terminal page; can be disabled
Wireless optionRequires 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
MountingWall mounted (hardware included) or set on a bench top
Power12 V DC from external 100 to 240 V DC power supply
Battery backupStandard 9 V battery enables continued measuring during power disruptions
Size (DewK) (H x W x D)125 x 211 x 51 mm (4.9 x 8.3 x 2.0 in)
Size (sensors) (L x Dia)79 x 19 mm (3.1 x 0.75 in)
Weight0.7 kg (1.5 lb)
CalibrationCertificate of NIST-traceable 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

Properties

MOQ1

Cross-References

Attached Documents