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Orion Star A Handheld Meters

Thermo Orion Star A Handheld Meters provide complete portability without sacrificing testing accuracy. IP-67 waterproof housing and protective plug covers prevent corrosion, even in difficult testing environments. The bright, backlit display clearly shows results in rain or shine. The ergonomic design features a recessed grove in the back and a textured keypad to ensure a secure grip, even with gloved or wet hands.

Choose from three meter types:

A100 Series Meters (A122, A123) are single-parameter meters suitable for basic testing needs. They feature a 7-button keypad and English language prompts. Meters hold up to 50 data points and display both temperature (°C and °F) and calibration.

A200 Series Meters (A223) is a dual-range parameter meters capable of storing up to 1000 data points. It features an expanded RDO range (up to 50 ppm) and a real-time clock. Meters have dual-probe capacity – RDO for standard readings and polarographic for faster DO readings. Other features include DIN pH buffer curves and mV values with pH readings. The multilanguage interface supports English, Spanish, French, Italian, German and Chinese.

A300 Series Meters (A321, A322, A323, A324, A325, A326, A329) are dual or multiparameter units with additional datalogging capabilities and security features. The informative display includes information about electrode status, time, date, sample ID, user ID, and calibration points. Stability and averaging provide flexible options for data. Units include up to 5-point calibration; calibration editing and log function are automatic. The non-volatile memory holds up to 5000 data points; units also store up to 10 methods to allow for customized procedures.

Meters are available with a variety of test parameters:

Meters with pH measurement feature automatic calibration for USA/NIST and DIN buffers (3-point calibration for A100 Series meters; 5-point calibration for A200 and A300 Series meters).

Meters with conductivity include readings for conductivity/TDS, temperature (in ºC or ºF), meter mode and power source. Meters include both a selectable cell constant and reading reference temperature to ensure accurate results. A200 and A300 Series meters include a choice of practical salinity or natural sea water curves for salinity readings, plus linear or ISO/EN 27888 curves for TDS.

Meters with dissolved oxygen include DO reading in mg/L or % saturation, temperature (in ºC or ºF), meter mode, and power source. Automatic temperature, manual salinity input, and manual barometric pressure compensation (automatic compensation on A200 and A300 Series) ensures an accurate result. A100 Series meters have two calibration options: water-saturated air method or a Winkler titration; A200 and A300 Series meters can be calibrated using water-saturated, air, air-saturated water, Winkler titration or zero-point calibration. These meters can also be used with AUTO-STIR polarographic DO probes for faster readings.

All meters include a universal 100-240 VAC AC adapter. Meters can also be powered by four AA batteries (not included). pH electrode input is BNC; ATC probe input is 8-pin mini-DIN.

Key Features

  • Ergonomic design and textured keypad work well with gloves or wet hands
  • AUTOREAD locks in stable readings and flashes a ready indicator
  • IP-67 waterproof housing withstands the rigors of field work
  • A200 and A300 Series models support GLP/GMP and datalogging
  • 3-year warranty


Measuring pH in Low Ionic Strength Solutions
Measuring pH in Wine and Juice
Measuring pH of Concentrated Samples
Measuring pH of Non-Aqueous and Mixed Samples
My samples read pH 13-14, but my highest pH calibration standard buffer only goes to pH 12.46. Will my sample readings be accurate if the calibration buffers don’t bracket the sample pH?
Orion Benchtop and Portable Meter Brochure [EN]

Specifications for Star A Handheld Meters
A100 Series Meters A200 Series Meters A300 Series Meters
pH Range: -2.00 to 16.00 -2.000 to 20.000 -2.000 to 20.000
pH Resolution: 0.1, 0.01 0.1, 0.01, 0.001 0.1, 0.01, 0.001
pH Relative Accuracy: ±0.01 ±0.002 ±0.002
pH Calibration Points: Up to 3 Up to 5 Up to 5
mV Range: ±1500.0 mV ±2000.0 mV ±2000.0 mV
mV Resolution: 0.1 0.1 0.1
mV Relative Accuracy: ±0.2 mV or ±0.05 % of reading, whichever is greater
±0.2 mV or ±0.05% of reading, whichever is greater
±0.2 mV or ±0.05% of reading, whichever is greater
ISE Range: - - 0 to 19,999
ISE Resolution: - - Up to 3 significant digits
ISE Relative Accuracy: - - ±0.2 mV or ±0.05% of reading, whichever is greater
ISE Units - - ppm, M, mg/L, %, ppb, none
Temperature Range: -5º to 105°C; 23 to 221ºF -5 to 105 -
Temperature Resolution: 0.1 0.1 -
Temperature Relative Accuracy: ±0.1 ±0.1 -
Conductivity Range: 0.1 µS/cm to 200 mS/cm 0.00 to 3000 mS 0.00 to 3000 mS
Conductivity Resolution: 0.01 µS minimum; 3 significant figures minimum 0.01 µS minimum; 4 significant figures minimum 0.01 µS minimum; 4 significant figures minimum
Conductivity Relative Accuracy: 0.5 % reading; ±1 digit 0.5% reading ±1 digit 0.5% reading ±1 digit
Conductivity Temperature Compensation: 20°, 25°C (default 25°C) 5 °, 10 °, 15°, 20°, 25°C 5 °, 10 °, 15°, 20°, 25°C
TDS Range: 1 to 19,999 mg/L 0 to 200 ppt 0 to 200 ppt
TDS Resolution: 4 significant digits 4 significant digits 4 significant digits
TDS Relative Accuracy: 0.5 % reading; ±1 digit ±0.5% reading ±1 digit ±0.5% reading ±1 digit
TDS Factor Range: Linear, 0.01 to 10.00 (default 0.49) Linear, 0.01 to 10.00 Linear, 0.01 to 10.00
Resistivity Range: - 2 Ohm to 100Meg-Ohm 2 Ohm to 100Meg-Ohm
Resistivity Resolution: - 2 ohms-cm 2 ohms-cm
Resistivity Relative Accuracy: - 0.5% ± 1 digit 0.5% ± 1 digit
Salinity Type: - Practical salinity or natural sea water Practical salinity or natural sea water
Salinity Range: - 0.01 to 80.0 ppt NaCl equivalent; 0.01 to 42 ppt practical salinity 0.01 to 80.0 ppt NaCl equivalent; 0.01 to 42 ppt practical salinity
Salinity Resolution: - 0.01 0.01
Salinity Relative Accuracy: - ± 0.1 ± 0.1
DO Concentration Range: 0 to 20 mg/L Polarographic: 0 to 90mg/L; RDO optical: 0 to 50mg/L Polarographic: 0 to 90mg/L; RDO optical: 0 to 50mg/L
DO Concentration Resolution: 0.01, 0.1 0.01, 0.1 0.01, 0.1
DO Concentration Relative Accuracy: ±0.2
Polarographic: ±0.2
RDO optical: ±0.1mg/L up to 8mg/L, ±0.2mg/L up to 20mg/L, 10% of reading beyond; ±2%
Polarographic: ±0.2
RDO optical: ±0.1mg/L up to 8mg/L, ±0.2mg/L up to 20mg/L, 10% of reading beyond; ±2%
DO % Saturation Range: 0 to 200
Polarographic: 0 to 600;
RDO optical: 0 to 500
Polarographic: 0 to 600;
RDO optical: 0 to 500
DO % Saturation Resolution: 0.1, 1 0.1, 1 0.1, 1
DO Manual Barometric Pressure Correction 450.0 to 850.0 mm Hg - -
DO Manual Salinity Factor Correction 0 to 45 ppt - -
DO Sensor Type: Polarographic Polarographic or RDO (optical/luminesce-based) DO Polarographic or RDO (optical/luminesce-based) DO

Specifications for Star A Handheld Meter Kits
Model Measures Kit Includes
A321 pH/ORP/Temp
ROSS Triode; pH 4, 7, 10 buffers, 10 pouches of each; ROSS electrode storage solution, 475 mL; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A122 Conductivity/Temp Conductivity cell, K=1.0; Conductivity standard, 1413 µS, 5 x 60 mL; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A222 Conductivity/Temp
DuraProbe conductivity cell, 3m cable, K=0.475; Conductivity standard, 1413 µS, 10 pouches; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A322
A123 DO/Temp Polarographic DO probe; Calibration sleeve for DO probe; DO probe maintenance kit; Protective armor with electrode holder; Hard carrying case
A223 RDO/DO/Temp
RDO optical/luminescence-based probe, 3m cable, s/s guard, calibration sleeve and cap; Protective armor w/ electrode holder; Hard carrying case
A323
A324 pH/ISE/ORP/Temp ROSS Triode; pH 4, 7, 10 buffers, 10 pouches of each; ROSS electrode storage solution, 475 mL; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A325 pH/ORP/Cond/Temp ROSS Triode, 3m cable; DuraProbe conductivity cell, 3m cable; pH 4, 7, 10 buffers, 10 pouches of each; ROSS electrode storage solution, 475 mL; Conductivity standard, 1413 µS, 10 pouches; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A326 pH/ORP/RDO/DO/Temp ROSS Triode, 3m cable; RDO optical/luminescence-based probe, 3m cable, s/s guard, calibration sleeve and cap; pH 4, 7, 10 buffers, 10 pouches of each; ROSS electrode storage solution, 475 mL; Conductivity standard, 1413 µS, 10 pouches; Rinse solution, 10 pouches; Protective armor w/ electrode holder; Hard carrying case
A329 pH/ISE/ORP/Cond/RDO/DO/Temp ROSS Triode, 3m cable; DuraProbe conductivity cell, 3m cable; RDO optical/luminescence-based probe, 3m cable, s/s guard, calibration sleeve and cap; pH 4, 7, 10 buffers, 10 pouches of each; ROSS electrode storage solution, 475 mL; Conductivity standard, 1413 µS, 10 pouches; Rinse solution, 10 pouches; Protective armor w/ probe holders; Hard carrying case

Filter
Item Product Description Includes Meter Model Type Accessory Description Unit of Measure Price Purchase
ORISTARA3245
STARA3245
ROSS Triode, Buffers (4/7/10), ROSS Electrode Storage Sol., Rinse Solution, Prot. Armor w/ Electrode Holder, Hard Carry Case A324 Kit pH/ISE Each
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ORISTARA3260
STARA3260
Meter Only A326 Meter pH/RDO/DO Each
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ORISTARA1230
STARA1230
Meter Only A123 Meter DO Each
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ORISTARA3215
STARA3215
ROSS Triode, Buffers (4/7/10), ROSS Electrode Storage Sol., Rinse Solution, Prot. Armor w/ Electrode Holder, Hard Carry Case A321 Kit pH Each
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ORISTARA2225
STARA2225
DuraProbe Cond. Cell, K=0.475 Cond. Standard, 1413µS, Rinse Solution, Prot. Armor w/ Electrode Holder, Hard Carry Case A222 Kit Conductivity Each
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3801-04
081010MD
Optional Polarographic probe Each
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ORISTARA3295
STARA3295
ROSS Triode, DuraProbe Cond Cell, RDO Probe, Buffers, ROSS Electrode Storage, Cond Standard, Rinse Sol, Prot Armor, Carry Case A329 Kit pH/ISE/Cond/DO Each
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ORISTARA3255
STARA3255
ROSS Triode, DuraProbe Cond Cell, Buffers, ROSS Electrode Storage, Cond Standard, Rinse Solution, Prot Armor, Hard Carry Case A325 Kit pH/Cond Each
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3801-03
087010MD
Replacement RDO probe Each
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ORISTARA1220
STARA1220
Meter Only A122 Meter Conductivity Each
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ORISTARA3230
STARA3230
Meter Only A323 Meter RDO/DO Each
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ORISTARA3210
STARA3210
Meter Only A321 Meter pH Each
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ORISTARA1225
STARA1225
Cond. Cell K=1.0, Cond. Standard 1413 µS, Rinse Solution, Protective Armor w/ Electrode Holder, Hard Carrying Case A122 Kit Conductivity Each
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ORISTARA2230
STARA2230
Meter Only A223 Meter RDO/DO Each
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ORISTARA1235
STARA1235
Polarographic DO probe, Calibration Sleeve, Maintenance Kit, Protective Armor w/ Electrode Holder, Hard Carrying Case A123 Kit DO Each
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ORISTARA3240
STARA3240
Meter Only A324 Meter pH/ISE Each
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ORISTARA3250
STARA3250
Meter Only A325 Meter pH/Cond Each
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ORISTARA2220
STARA2220
Meter Only A222 Meter Conductivity Each
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ORISTARA3265
STARA3265
ROSS Triode, RDO Optical/Luminescence-Based Probe, Buffers, ROSS Electrode Solution, Cond Stand, Rinse, Prot Armor, Carry Case A326 Kit pH/RDO/DO Each
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ORISTARA2235
STARA2235
RDO Optical/Luminescence-Based Probe, Protective Armor w/ Electrode Holder, Hard Carrying Case A223 Kit RDO/DO Each
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ORISTARA3225
STARA3225
DuraProbe Cond. Cell, K=0.475 Conductivity Standard, 1413µS, Rinse Solution, Prot. Armor w/ Electrode Holder, Hard Carry Case A322 Kit Conductivity Each
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ORISTARA3220
STARA3220
Meter Only A322 Meter Conductivity Each
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ORISTARA3290
STARA3290
Meter Only A329 Meter pH/ISE/Cond/DO Each
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3801-02
STARA3235
RDO Opt/Lum-Based Probe, 3m Cable, S/S guard, Calibration Sleeve and Cap, Protective Armor w/ Electrode Holder, Hard Carry Case A323 Kit RDO/DO Each
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