ACR Systems News
Hardest Working Data Loggers in the Industry - ACR
SR2/SRP2 FAQ

Frequently Asked Questions for SR2, SRP2

What is the total accuracy of the logger and the sensors?

For SmartReader 2:

RH: Accuracy is ±4% from 10 to 90% and a temperature range of -20°C to 40°C ( -4°F to 104°F)

Temperature:  Accuracy is 0.6°C at 25°C (1.1°F at 77°F)

For SmartReader Plus 2:

 RH: Accuracy is ±3% from 10 to 90% and a temperature range of -20°C to 40°C ( -4°F to 104°F)

Temperature: Accuracy is 0.23°C at 25°C (0.42°F at 77°F)

Does the unit come with the RH sensor?

Yes. It comes with one internal RH sensor and one internal onboard temperature sensor built-in. Therefore, wherever you place the logger it will record the temperature and RH value. If you want to record the temperature and RH of a second room, you will require the EH-020A probe (which is the external temperature and RH probe). The part number for this optional probe is: 01-0040.

Does the unit come with an EH-020A sensor?

No. It is an optional accessory, ordered separately.

What is the cable length of the EH-020A probe?

The EH-020A comes with a cable of 90 cm (3 feet).

Can I extend the cable of the External EH-020A probe?

Yes. The maximum recommended length is 100 feet of four-wire 22-gauge stranded conductor with a shield.

What are the chemical tolerances of the SR2/SRP2 internal RH sensor and the EH-020A probe?

Organic solvents typically 1,000 to 10,000 ppm

Corrosive agents (strong acids S02, H2S04, C12, HC1, H2S etc.) typically 1 to 10 ppm

Weak acids typically 100 to 1,000 ppm

Bases typically 10,000 to 100,000 ppm

How often should the loggers be calibrated?

Once a year (when used under normal operating conditions).

Do you issue calibration certificates and are the loggers NIST traceable?

Yes. When we calibrate the loggers we issue you a calibration certificate for the RH sensor (which is NIST traceable).

Temperature NIST traceable calibration is available at an additional charge.

SHOP ACR SYSTEMS
APP GUIDE ACR SYSTEMSMEASUREMENT GUIDE ACR SYSTEMSPRODUCT CATALOG ACR SYSTEMSACR SYSTEMS DEALERS
STAY INFORMED

Sign up today to be the first to know about new ACR products, events & special offers.

SIGN UP