Name: Dwyer Instruments DL71 | Differential pressure datalogger | Range ±1 w.c. (2.5 mbar)
Rating: 4.7 (25 reviews)

Dwyer Instruments DL71 | Differential pressure datalogger | Range ±1" w.c. (2.5 mbar)

Dwyer Instruments DL71 | Differential pressure datalogger | Range ±1" w.c. (2.5 mbar)

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Part Number : DL71

The Model DL7 Differential Pressure Data Logger allows you to track and record low differential pressures as well as temperatures. A thermistor on board allows the unit to measure the outside temperature. Sample times can be adjusted by the user from 0.04 seconds to 8 hours, with choices for fill-then-stop or first-in, first-out sampling. With a built-in lithium battery, loggers may function completely without the need for an external power source and store up to 21,500 readings. To easily program the logger or transfer data to a computer, use the Model DL200 Windows® software (separately offered). The DL7 series logger is perfect for air duct velocity monitoring, HVAC system testing and balancing, and room pressure verification.

Specification
Features
Catalog

Specifications

Details

Manufacturer

Dwyer Instruments

Temperature Range

32 to 158°F (0 to 70°C)

MEMORY SIZE

21,500 readings

Accuracy

±0.05" w.c. (up to 2" range); ±0.1" w.c. (5" and 10" range)

Accuracy

Thermal: ±0.5% FS

Accuracy

Clock: ±2 sec/day plus one sampling interval

Resolution

±0.01" w.c.

Resolution

12 bits( 1 in 4096)

Repeatability

±0.05% FS

Sampling Rate

Selectable from 0.04 seconds to 8 hours

Ambiant temperature

-40 to 158°F (-40 to 70°C), 0 to 95% RH, non-condensing

Connection

Two 1/8" I.D. permanent protective tubing

Rating

Maximum Pressure: 4X rated pressure

Power

Requirement: 3.6 V TL5134 lithium metal battery, internal, factory replaceable

POWER CONSUMPTION

5-10 µA

Housing Material

PPE & PS (polyphenylene ether & polystyrene)

Number of Channels

Two; internal thermistor, and a differential pressure sensor

Range

Internal Thermistor: -40 to 158°F (-40 to 70°C)

Resolution

Internal Thermistor: 0.7°F (0.4°C), R25 value equal to 10,000Ω [10kΩ @ 25°C (77°F)]

Non Linearity

±0.05% FS (BFSL)

Drift

±0.5% FS/yr

Sampling Methods

Continuous (first-in, first-out: not available from 40 ms to 8 sec.), Stop when full (fill-then-stop), or delayed start

System Requirements

IBM compatible 386 or above and Windows® 3.1 or later with 2MB RAM and 2MB hard drive disk space, one serial port

Weight

4 oz (110 g)

Approvals

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