Thermo Scientific™ Orion Star™ A221 Portable pH Meter

Reliably measure pH, mV, ORP and temperature with our portable pH meter for advanced field analysis and printer or computer interfacing.

Record accurate and reliable pH, mV, ORP and temperature measurements with the Thermo Scientific™ Orion Star™ A221 Portable pH Meter. This meter is ideal for a wide range of applications and advanced pH analysis in the field. Perform up to a 5 point pH calibration, log up to 1000 data point sets with time/date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer with free downloadable Orion Star™ Com software. Waterproof meter ensures durable, rugged performance in outdoor environments with an IP67-rated housing.

Don’t leave your measurements to chance when analyzing samples outside the lab. Orion Star A221 Portable pH Meters are designed to offer the reliability you need in a user-friendly package for your dedicated pH testing needs. This waterproof, portable meter displays critical data with your measurement including temperature, date and time, read type, measurement stability, active calibration info and power source status.

• Measure pH, mV, relative mV or ORP with temperature
• Perform up to a 5 point pH calibration using automatic buffer recognition of NIST or DIN buffer groups with choice to manually enter custom buffer values
• Informative, easy-to-read backlit graphic display with clear onscreen instructions simplifies operation
• Capture your critical readings with measurement stability indicator and selectable read modes — Auto-Read holds a stable reading and Continuous shows changing readings with hold option
• Data log collects and date/time stamps up to 1000 measurement sets
• Non-volatile meter memory ensures your data and settings are protected, even with loss of power
• Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
• Flexible power options with AA batteries or optional universal power adapter
• IP67-rated housing is waterproof for rugged field operation
• Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand
• Meters offer CE, TUV 3-in-1 and FCC Class A certifications
• 3-year replacement warranty

AC Adapter

Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)

Outputs

USB, RS-232

Accuracy (mV)

±0.2 mV or ±0.05% of reading whichever is greater

Accuracy (pH)

±0.002

Alarm Output

Calibration due alarm (fixed 12 hour)

Backlight Option

Yes, selectable

Battery Life

800 hr.

Battery Type

4 x AA

Calibration

pH, relative mV (RmV), ORP and temperature

Calibration Points

1 point relative mV (RmV) mode, 1 point ORP mode

Certifications/Compliance

CE, TUV 3-1, FCC Class A

Data Management Details

Transfer single, range or all data points to printer or computer

Data Points

1000 with date and time stamp

Description

Orion Star A221 pH portable meter

Channels

1

Display Type

LCD Graphic, Backlit

IP Rating

IP 67

Measurement Modes

pH, mV, Relative mV, ORP with Temperature

Range (mV)

±2000.0 mV

Range (pH)

-2 to 20

Resolution (pH)

0.1/0.01/0.001

Temperature Range (Metric)

-5.0°C to +105.0°C

Includes

Star A221 pH meter, 4 AA batteries, computer cable

Inputs

BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe)

Isopotential Point

7.000pH

Keypad

Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys

Languages

English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update

Log Function Type

Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode

Memory

Non-volatile memory preserves data log, calibration log and meter settings

Methods

10 per channel with password protection

Model

Orion Star A221 pH/mV/RmV/ORP/Temperature Portable Meter

Power Supply

4 AA batteries (included) or universal AC adapter (sold separately)

Probe Type

pH electrode, ORP electrode, reference half-cell electrode, ATC temperature probe (purchase separately)

Range (ORP)

±2000.0 mV

Range (Relative mV)

±2000.0 mV

Relative Humidity Range

5 to 85%, non-condensing

Resolution (mV)

0.1mV

Stability

Smart Stability and Smart Averaging

Temperature Accuracy

±0.1°C

Temperature (English) Operating

41°F to 113°F (ambient)

Temperature (Metric) Operating

5°C to 45°C (ambient)

Temperature Probe Calibration

1 point temperature offset calibration

Temperature Range (English)

22.0°F to 221.0° F

Temperature Resolution

0.1°C, 0.1°F

Temperature Selection

Manual or automatic with ATC temperature probe

Warranty

3 Year Meter

Dimensions (L x W x H)

24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)

Weight (English)

1.2 lb.

Weight (Metric)

0.5 kg