Multiparameter Meters
- (2)
- (16)
- (1)
- (4)
- (2)
- (4)
- (15)
- (12)
- (2)
- (15)
- (1)
- (4)
- (11)
- (2)
- (13)
- (2)
- (40)
- (65)
- (2)
- (2)
- (8)
- (2)
- (35)
- (2)
- (19)
- (6)
- (2)
- (4)
- (2)
- (3)
- (9)
- (58)
- (8)
- (21)
- (2)
Résultats de la recherche filtrée
Fisherbrand™ accumet™ XL200 Benchtop pH/Conductivity Meters
Provide advanced measurements with simple operation and offer a large, vivid color touch-screen display that allows for dynamic functionality. Fisherbrand accumet XL200 pH/Conductivity benchtop meters offer advanced features with simple operation to help ensure your measurements are reliable and your laboratory processes are efficient.
| Hauteur (impériale) | 3.89 in. |
|---|---|
| Certifications/Conformité | NIST, ISO, FDA, USDA, EPA |
| Précision (résistivité) | ± 1% full scale |
| Précision | Multiple |
| Résolution de la température | 0.1°C |
| Précision (pH) | ±0.002 |
| Dimensions (L x l x H) | 24.6 x 17.3 x 9.9cm (9.7 x 6.8 x 3.9 in.) |
| Garantie | 3 Years |
| Résolution (TDS) | 0.01/0.1ppm, 0.001/0.01/0.1ppt |
| Points d’étalonnage (conductivité) | Automatic (4 points), maximum 1/range, manual (5 points), maximum 1/range |
| Gamme (salinité) | 0 to 80 ppt |
| Fréquence | 50/60Hz |
| Longueur (impériale) | 9.68 in. |
| Sorties | RS232, USB-A, Mini-B USB, RJ45, stirrer port (2) |
| Détails de la gestion des données | 3 to 86400 sec. |
| Tension | 100/240 V |
| Précision de la température | ±0.2°C |
| Gamme (résistivité) | 3 W to 100 MW over 4 ranges: 0 to 20 kW, 20 to 200 kW, 200 kW to 2 MW, 2 to 100 MW |
| Gamme de détection | Multiple |
| Points de données | 2000 |
| Points d’étalonnage (pH) | Up to 6 preset or 5 custom |
| Poids (métrique) | 1.13 kg |
| Précision (conductivité) | ±1% FS |
| Longueur (métrique) | 24.6 cm |
| Constante de cellule | 0.01 to 10 |
| Résolution (salinité) | 0.01/0.1ppm, 0.001/0.01/0.1ppt |
| Résolution (résistivité) | 0.01/0.1W, 0.001/0.1kW, 0.01MW |
| Résolution (pH) | 0.1/0.01/0.001 |
| Gamme (TDS) | 0.050 ppm to 500 ppt (at TDS factor 1.00) |
| Résolution | Multiple |
| Entrées | BNC, ATC |
| Gamme (mV) | ±2000 mV |
| Résolution (conductivité) | 0.001/0.01/0.1mS |
| Type d’affichage | LCD |
| Hauteur (métrique) | 9.9 cm |
| Largeur (métrique) | 17.3 cm |
| Poids (impériale) | 2.5 lb. |
| Précision (mV) | ±0.2 mV |
| Résolution (mV) | 0.1mV |
| Gamme (pH) | -2 to 20 |
| Précision (TDS) | ± 1% full scale |
| Gamme (conductivité) | 0 to 500 mS |
| Précision (salinité) | ± 1% full scale |
Fisherbrand™ accumet™ XL600 Benchtop Dual pH/ISE, Conductivity and Dissolved Oxygen Meters
Provide advanced measurements with simple operation and offer a large, vivid color touch-screen display. Fisherbrand accumet XL600 pH/ISE/conductivity/DO benchtop meters offer advanced features with simple operation to help ensure your measurements are reliable and your laboratory processes are efficient.
| Certifications/Conformité | NIST, ISO, FDA, USDA, EPA |
|---|---|
| Précision (résistivité) | ± 1% full scale |
| Longueur (impériale) | 9.68 in. |
| Détails de la gestion des données | 3 to 86400 sec. |
| Tension | 100/240 V |
| Précision de la température | ±0.2°C (±0.3°F) |
| Gamme de détection | Multiple |
| Points d’étalonnage (pH) | Up to 6 preset or 5 custom |
| Poids (métrique) | 1.13 kg |
| Gamme (OD) | 0 to 20mg/L (0 to 1272mbar), 0 to 200% saturation with 13-620-SSP electrode |
| Résolution (pH) | 0.1/0.01/0.001 |
| Entrées | 2 BNC, 2 ATC |
| Résolution (conductivité) | 0.001/0.01/0.1mS |
| Type d’affichage | LCD |
| Précision (DO) | 0.1 +1 LSD |
| Poids (impériale) | 2.5 lb. |
| Résolution (mV) | 0.1mV |
| Précision (TDS) | ± 1% full scale |
| Précision (salinité) | ± 1% full scale |
| Hauteur (impériale) | 3.89 in. |
| Précision | Multiple |
| Résolution de la température | 0.1°C |
| Résolution (ionométrie) | 2/3/4 Digits |
| Précision (pH) | ±0.002 |
| Dimensions (L x l x H) | 24.6 x 17.3 x 9.9cm (9.7 x 6.8 x 3.9 in.) |
| Garantie | 3 Years |
| Résolution (TDS) | 0.01/0.1ppm, 0.001/0.01/0.1ppt |
| Gamme (ions spécifiques) | ±2000 mV |
| Points d’étalonnage (conductivité) | Automatic (4 points), maximum 1/range, manual (5 points), maximum 1/range |
| Résolution (OD) | 0.01mg/L (0.1mbar), 0.1% saturation |
| Gamme (salinité) | 0 to 80 ppt |
| Fréquence | 50/60Hz |
| Sorties | RS232, USB-A, Mini-B USB, RJ45, stirrer port (2) |
| Gamme (résistivité) | 3 W to 100 MW over 4 ranges: 0 to 20 kW, 20 to 200 kW, 200 kW to 2 MW, 2 to 100 MW |
| Points de données | 2000 |
| Points d’étalonnage (ionométrie) | 2 to 6 |
| Précision (conductivité) | ±1% FS |
| Longueur (métrique) | 24.6 cm |
| Constante de cellule | 0.01 to 10 |
| Résolution (salinité) | 0.01/0.1ppm, 0.001/0.01/0.1ppt |
| Résolution (résistivité) | 0.01/0.1W, 0.001/0.1kW, 0.01MW |
| Gamme (TDS) | 0.050 ppm to 500 ppt (at TDS factor 1.00) |
| Résolution | Multiple |
| Gamme (mV) | ±2000 mV |
| Hauteur (métrique) | 9.9 cm |
| Largeur (métrique) | 17.3 cm |
| Précision (mV) | ±0.2 mV |
| Gamme (pH) | -2 to 20 |
| Gamme (conductivité) | 0 to 500 mS |
| Précision (ions spécifiques) | 0.5% full scale (monovalent ion), 1% full scale (divalent ion) |
Fisherbrand™ Traceable™ pH/ORP/Temperature Meter
Measure critical water quality parameters — without the need to carry multiple units.
Fisherbrand™ accumet™ AP125 Portable pH/Ion/mV/Temperature Meter Kit
Accurate measurements any time, anywhere
Fisherbrand™ accumet™ AP125 Portable pH/Ion/mV/Temperature Meter
Accurate measurements any time, anywhere
| Précision | Multiple |
|---|---|
| Type de produit | Meter Only |
| Garantie | 3 Years |
| Résolution (pH) | Adjustable |
| Measurement Modes | pH,Ion,mV,Temperature |
| Points d’étalonnage | 10 |
| Résolution | Multiple |
| Gamme (mV) | 0 to ±2000 mV |
| À utiliser avec (application) | pH, Ion concentration, mV, Temperature |
| Type d’affichage | LCD |
| Précision (mV) | 0 to ±2000mV |
| Plage de températures (métrique) | -5°C to +100°C |
| Indice IP | IP67 |
| Plage | -2 to +20pH |
| Comprend | Meter, 9V battery, manual |
| Gamme (pH) | 2 to 20 |
| Plage de températures (impériale) | 23°F to 212°F |
| Points de données | 200 |
Ohaus™ Starter ST20M-C Multi-Parameter Pen Meter
Compact design for fast, convenient electrochemistry reading. Measure conductivity, pH, temperature and salinity with the same meter. IP67, automatic temperature compensation, 3-point calibration and auto-off after 6 minutes of non-use
METTLER TOLEDO™ Portable pH/Conductivity/Dissolved Oxygen/Ion Meters
Water and dust proof, IP67 rated meter for portable or field measurements. Portable meters compatible with pH, conductivity, dissolved oxygen, and ion selective electrodes.
| Certifications/Conformité | ISO 9001:2000 |
|---|---|
| Indice IP | IP67 |
Thermo Scientific™ Orion™ Pro Star PC215 pH/ion and Conductivity Bench Meter with Stand
Designed to provide accurate and reliable pH, ORP, ion concentration, conductivity, TDS, salinity, resistivity and temperature analysis, the Thermo Scientific™ Orion™ Pro Star PC215 bench meter is well suited for laboratories that desire a modern meter with advance performance.
| Certifications/Conformité | CE, TUV 3-1, FCC Class A |
|---|---|
| Clavier | Capacitive touchscreen user interface |
| Précision (résistivité) | ±0.5% reading |
| Langues | Chinese, English, French, German, Italian, Japanese, Korean, Portuguese, Spanish |
| Option de rétro-éclairage | Yes |
| Fonctions d’ionométrie avancées | Single known addition, single known subtraction, double known addition, double known subtraction, analyte addition and analyte subtraction |
| Précision de la température | ±0.3°C, ±0.5°F |
| Points d’étalonnage (pH) | 1 to 5 points |
| Poids (métrique) | 1.00 kg |
| Sorties d’alarme | Calibration reminder alarm, high and low limit alarm per parameter |
| Type de fonction d’enregistrement | Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode |
| Résolution (pH) | 0.1, 0.01 or 0.001 pH |
| Résolution (rH) | 0.1 mV |
| Entrées | Channel 1: BNC for pH, ORP or ISE, 8-pin MiniDIN for ATC, pin-tip for reference; Channel 2: 8-pin MiniDIN for conductivity with ATC |
| Étalonnage | pH, ORP, Ion Concentration, Conductivity, TDS, Salinity, Temperature |
| Température (métrique) de référence | 5, 10, 15, 20, 25 or 30°C |
| Résolution (conductivité) | 0.001 μS/cm minimum, auto-ranging, up to 4 digits |
| Type d’affichage | 7-in. High-resolution Color Graphic LCD |
| Gamme (mV relative) | -2000 to 2000 mV |
| Mémoire | Non-volatile |
| Poids (impériale) | 2.20 lbs. |
| Résolution (mV) | 0.1 mV |
| Plage de températures (métrique) | -30.0°C to +130.0°C |
| Précision (TDS) | ±0.5% reading |
| Précision (salinité) | ±0.5% reading |
| Sélection de la température | Automatic with ATC temperature sensor, ambient or manual |
| Compensation thermique | Linear (0.00 to 10.00 %/°C), nLFn (non-linear natural water), nLFu (non-linear ultra-pure water), EP/USP or off |
| Résolution de la température | 0.1°C, 0.1°F |
| Gamme (rH) | -2000 to 2000 mV |
| Résolution (ionométrie) | 0.0001 minimum, 1 to 5 digits |
| Résolution (ion) | 0.0001 minimum, 1 to 5 digits |
| Précision (pH) | ±0.002 pH |
| Dimensions (L x l x H) | 218.9 x 153.2 x 91.33 mm; 8.62 x 6.03 x 3.60 in. |
| Garantie | 2 year meter warranty |
| Précision (rH) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
| Résolution (TDS) | 0.001 ppm or mg/L minimum, auto-ranging, up to 4 digits |
| Gamme (ions spécifiques) | 0.0001 to 19999 |
| Adaptateur secteur | Universal 100-240 V 50/60 Hz power supply with wall plugs for US/Japan, Euro, UK/Singapore, Australia/New Zealand and China outlets |
| Point isopotentiel | 7.000 pH; 1.000 ion concentration |
| Canaux | 2 |
| Points d’étalonnage (conductivité) | 1 to 5 points |
| Modes de mesure de la salinité | Natural Seawater (ppt), Practical Salinity Units (PSU), or % NaCl |
| Gamme (salinité) | 0.010 to 80.00 ppt; 0.01 to 42.00 PSU; or 0.01 to 400.0% NaCl |
| Sorties | USB flash drive, computer or printer (STARA-106) |
| Méthodes | 10 per channel (20 total) |
| Gamme de facteurs TDS | Linear (0.01 to 10.00), ISO/EN 27888, 442, NaCl |
| Indice IP | IP54 |
| Gamme (résistivité) | 1.0 Ω to 100.0 MΩ |
| Points de données | 10,000 with Date and Time Stamp |
| Points d’étalonnage (ionométrie) | Up to 5 |
| Précision (conductivité) | ±0.5% reading |
| Étalonnage de la sonde de température | 1 or 2 point temperature offset calibration |
| Constante de cellule | 0.100 cm-1, 0.475 cm-1, 0.550 cm-1, 1.000 cm-1, 10.00 cm-1 or user-defined from 0.001 to 199.9 cm-1 |
| Résolution (salinité) | 0.001 ppt minimum; 0.01 PSU minimum; or 0.01% NaCl minimum, auto-ranging |
| Résolution (résistivité) | 0.1 Ω minimum, auto-ranging |
| Gamme (TDS) | 0.010 ppm to 500.0 ppt (TDS factor of 1.00); or 0.010 mg/L to 500.0 g/L (TDS factor of 1.00) |
| Points d’étalonnage | 1 to 5 (pH), 1 (ORP), 1 to 5 (ion), 1 to 5 (conductivity), 1 to 5 (TDS), 1 (salinity), 1 to 2 (temperature) |
| Gamme (ion) | 0.0001 to 19999 |
| Gamme (mV) | -2000 to 2000 mV |
| Précision (mV) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
| Gamme (pH) | -2 to 20 |
| Plage de températures (impériale) | -22.0°F to +266.0°F |
| Gamme (conductivité) | 0.010 μS/cm to 3000 mS/cm |
| Précision (ions spécifiques) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
METTLER TOLEDO™ S900 SevenExcellence™ Dissolved Oxygen/BOD Benchtop Meter
The S900 is a dissolved oxygen(DO)/biological oxygen demand (BOD) meter. It can be expanded with additional modules to measure pH, conductivity, ISE, salinity, TDS, and Redox/ORP. It has an intuitive touchscreen, measurement shortcuts, and can export data to a printer, Excel file, or LIMS system.
| Gamme (OD) | 0.000 to 50mg/L (ppm) |
|---|---|
| Précision | ±1 |
| Plage de températures (métrique) | 0°C to 50°C |
| Percent Saturation Range Polarographic DO | 0 to 500% |
| Précision (concentration) | ±0.1mg/L from 0 to 8; ±0.2mg/L from 8 to 20; ±10% from 20 to 50 |
| Measurement Modes | Dissolved Oxygen |
| Canaux | 3 |
| Résolution | 0.001 (display) |
| Type d’affichage | Color TFT |
Fisherbrand™ accumet™ AR425 pH/Ion Meter pH Kit
Designed to deliver precise and reliable electrochemistry testing, the accumet AR425 offers enhanced performance in a streamlined design. Ideal for laboratories requiring dependable measurement capabilities.
| Certifications/Conformité | CE, TUV 3-1, FCC Class A |
|---|---|
| Type de produit | Benchtop Multiparameter Meters |
| Type de fonction d’enregistrement | Automatic Data Logging |
| Précision (pH) | ±0.002 pH |
| Résolution (pH) | 0.1, 0.01, or 0.001 pH |
| Measurement Modes | pH,mV,ORP,Ion,Temperature |
| Points d’étalonnage | 1 |
| Canaux | 1 |
| Étalonnage | pH |
| Option de rétro-éclairage | Yes |
| Type d’affichage | 7-in. High-resolution Color Graphic LCD |
| Précision (mV) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
| Plage de températures (métrique) | -30.0 to 130.0°C |
| Indice IP | IP54 |
| Tension | 100/240 V |
| Gamme (pH) | -2 to 20 |
| Points de données | 5000 with Date and Time Stamp |
Mettler Toledo™ Seven2Go S7 Conductivity Meter
The Seven2Go portables are engineered to provide users with fast quality data, one-handed operation, and durability, making them ideally suited for mobile applications in the laboratory, at-line, and outdoors.
| Certifications/Conformité | ISO 9001:2000 |
|---|---|
| Compensation thermique | Automatic or Manual |
| Dimensions (L x l x H) | 222 x 70 x 35 mm |
| Résolution (TDS) | 0.01 to 1 |
| Measurement Modes | Conductivity |
| Canaux | 1 |
| Modèle | Single channel; conductivity, TDS, salinity |
| Gamme (salinité) | 0.00 to 42 psu |
| Type de batterie | 4 x 1.5 V AA or 1.3 V NiMH acc. |
| Indice IP | IP67 |
| Gamme (résistivité) | 0.00 to 100.0 Mohm/cm |
| Poids (métrique) | 290 g |
| Précision (conductivité) | ±0.5% |
| Constante de cellule | Manual entry |
| Résolution (salinité) | 0.01 to 0.1 |
| Gamme (TDS) | 0.01 mg/L to 600 g/L |
| Points d’étalonnage | 1 |
| Entrées | LTW 7-pin (sensor) |
| Résolution (conductivité) | 0.01 |
| Type d’affichage | Color Graphic |
| Plage de températures (métrique) | -5°C to +105°C |
| Autonomie de la batterie | 200 to 250 hr. |
| Gamme (pH) | 0 to 14 |
| Précision (TDS) | ±0.5% |
| Gamme (conductivité) | 0.01 μS/cm to 1000 mS/cm |
| Précision (salinité) | ±0.5% |
Thermo Scientific™ Expert CTS Pocket Tester
Ensure accurate measurements of Conductivity, TDS, Salinity, and Temperature using the easy-to-use, large 4-digit display pocket tester for many applications.
Fisherbrand™ accumet™ AR450 pH/ion/Conductivity Meter Kit
Designed to deliver precise and reliable electrochemistry testing, the accumet AR450 offers enhanced performance in a streamlined design. Ideal for laboratories requiring dependable measurement capabilities.
Thermo Scientific™ Elite pH Pocket Testers and Replacement Sensors
Flexible on-the-go pH and temperature testing using durable Elite pocket testers with replaceable sensors for a variety of applications including environmental monitoring, pools, spas and more!
Thermo Scientific™ Orion™ Pro Star PD216 pH/ion and DO Bench Meter
Designed to provide accurate and reliable pH, ORP, ion concentration, dissolved oxygen, barometric pressure and temperature analysis, the Thermo Scientific™ Orion™ Pro Star PD216 bench meter is well suited for laboratories that desire a modern meter with advance performance.
| Certifications/Conformité | CE, TUV 3-1, FCC Class A |
|---|---|
| Clavier | Capacitive touchscreen user interface |
| Measurement Modes | pH,ORP,mV,Ion Concentration (ISE),Dissolved Oxygen (mg/L),Dissolved Oxygen (% Saturation),Temperature,Barometric Pressure |
| Langues | Chinese, English, French, German, Italian, Japanese, Korean, Portuguese, Spanish |
| Option de rétro-éclairage | Yes |
| Fonctions d’ionométrie avancées | Single known addition, single known subtraction, double known addition, double known subtraction, analyte addition and analyte subtraction |
| Précision de la température | ±0.3°C, ±0.5°F |
| Points d’étalonnage (pH) | 1 to 5 points |
| Poids (métrique) | 1.00 kg |
| Gamme (OD) | 0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm |
| Sorties d’alarme | Calibration reminder alarm, high and low limit alarm per parameter |
| Type de fonction d’enregistrement | Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode |
| Résolution (pH) | 0.1, 0.01 or 0.001 pH |
| Percent Saturation Range Polarographic DO | 0.0 to 600.0% saturation |
| Résolution (rH) | 0.1 mV |
| Entrées | Channel 1: BNC for pH, ORP or ISE, 8-pin MiniDIN for ATC, pin-tip for reference; Channel 2: 9-pin MiniDIN for dissolved oxygen with ATC |
| Étalonnage | pH, ORP, Ion Concentration, DO, Barometric Pressure, Temperature |
| Type d’affichage | 7-in. High-resolution Color Graphic LCD |
| Gamme (RDO) | 0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm |
| Gamme (mV relative) | -2000 to 2000 mV |
| Mémoire | Non-volatile |
| Précision (DO) | ±2% saturation; ±0.02 mg/L or ppm |
| Poids (impériale) | 2.20 lbs. |
| Précision (baromètre) | ±6.0 mmHg; ±0.008 bar |
| Résolution (mV) | 0.1 mV |
| Plage de températures (métrique) | -30.0°C to +130.0°C |
| Facteur de salinité | 0.0 to 50.0 ppt |
| Plage de saturation en pourcentage (RDO) | 0.0 to 600.0% saturation |
| Percent Saturation Relative Accuracy (RDO) | ±2% saturation |
| Sélection de la température | Automatic with ATC temperature sensor, ambient or manual |
| Type de sonde | Polarographic or optical DO electrode |
| Résolution de la température | 0.1°C, 0.1°F |
| Gamme (rH) | -2000 to 2000 mV |
| Résolution (ionométrie) | 0.0001 minimum, 1 to 5 digits |
| Résolution du coefficient de saturation (RDO) | 0.1, 1% saturation |
| Correction de la pression barométrique | Yes, automatic with built-in barometer or manual |
| Résolution (ion) | 0.0001 minimum, 1 to 5 digits |
| Précision (pH) | ±0.002 pH |
| Dimensions (L x l x H) | 218.9 x 153.2 x 91.33 mm; 8.62 x 6.03 x 3.60 in. |
| Garantie | 2 year meter warranty |
| Précision (rH) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
| Gamme (ions spécifiques) | 0.0001 to 19999 |
| Précision (OD par mesure polarographique) | ±2% saturation; ±0.02 mg/L or ppm |
| Adaptateur secteur | Universal 100-240 V 50/60 Hz power supply with wall plugs for US/Japan, Euro, UK/Singapore, Australia/New Zealand and China outlets |
| Point isopotentiel | 7.000 pH; 1.000 ion concentration |
| Canaux | 2 |
| Résolution (OD) | 0.1, 1% saturation; 0.01, 0.1 mg/L or ppm |
| Sorties | USB flash drive, computer or printer (STARA-106) |
| Méthodes | 10 per channel (20 total) |
| Gamme (OD par mesure polarographique) | 0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm |
| Indice IP | IP54 |
| Percent Saturation Relative Accuracy (Polarographic DO) | ±2% saturation |
| Points de données | 10,000 with Date and Time Stamp |
| Points d’étalonnage (ionométrie) | Up to 5 |
| Gamme de pression | 400.0 to 850.0 mmHg; 0.533 to 1.133 bar |
| Étalonnage de la sonde de température | 1 or 2 point temperature offset calibration |
| Résolution (OD par mesure polarographique) | 0.1, 1% saturation; 0.01, 0.1 mg/L or ppm |
| Points d’étalonnage | 1 to 5 (pH), 1 (ORP), 1 to 5 (ion), 1 to 2 (DO), 1 (barometer), 1 to 2 (temperature) |
| Modes d’étalonnage | Water-saturated air (100% and 0% saturation), air-saturated water (100% and 0% saturation) or custom concentration value (Winkler) |
| Gamme (ion) | 0.0001 to 19999 |
| Gamme (mV) | -2000 to 2000 mV |
| Percent Saturation Resolution (Polarographic DO) | 0.1, 1% saturation |
| Précision (mV) | ±0.2 mV or ±0.05% of the reading, whichever is greater |
| Résolution (RDO) | 0.1, 1% saturation; 0.01, 0.1 mg/L or ppm |
| Gamme (pH) | -2 to 20 |
| Plage de températures (impériale) | -22.0°F to +266.0°F |
| Précision (RDO) | ±2% saturation; ±0.02 mg/L or ppm |
| Précision (ions spécifiques) | ±0.2 mV or ±0.05% of the reading, whichever is greater |