Vaisala K‑PATENTS® Teflon Body Refractometer
PR-23-M
for chemically aggressive solutions and ultra-pure fine chemical processes
The PR-23-M has a built-in flow cell designed to keep all metal and other easily corroding parts from coming into contact with the process liquid. All the wetted parts are made of non-metallic materials, either PTFE (Teflon®) or PVDF (Kynar®), and thus the PR-23-M sensor withstands corrosion well.
The PR-23-M sensor is connected to the process by a G1/2 inch female or a 1/2 inch NPT process connection.
The measurement range covers 0-100 % by weight. The accuracy is typically ±0.1 % b.w. and the measurement is automatically temperature compensated. Low and high concentration alarms can be configured. Because of the digital sensing technology, even large amounts of suspended solids, bubbles or color changes do not affect the measurement or the accuracy.
Each sensor is provided with a calibration certificate comparing a set of standard liquids to the actual sensor output. The calibration and accuracy can be verified onsite with the certified Refractive Index liquids and K-Patents documented procedure.
Features / Benefits
- Universal calibration of each sensor: All sensors are freely interchangeable.
- Full measurement range Refractive Index nD 1.3200 – 1.5300, which corresponds to 0-100 % by weight.
- Dual connectivity: one transmitter can operate two sensors. A second sensor can be easily integrated later.
- Completely digital system: particles and bubbles do not affect operation or accuracy.
- CORE-optics: no drift, no re-calibration, no mechanical adjustments.
- Ethernet connection and remote panel for data-logging and remote operation.
- Process temperature range: -20°C – 130°C (-4°F – 266°F)
- Fast process temperature measurement by built-in Pt1000 and automatic temperature compensation.
- Easy on-site instrument verification within users’ own quality assurance system with standard Refractive Index liquids.
- ATEX approved for Zone II, area classification EX II 3 G EEx nA II T4.
- ATEX approved for Zones 0 and 1, area classification ATEX II 1G Ex ia IIC T4 (only Intrinsically safe PR-23-M-IA with single sensor transmitter STR).
- FM approved for Class I, Div. 2, Groups A, B, C and D, T6.
- CSA certified for Class I, Div. 2, Groups A, B, C and D, T4.
- cCSAus certified for Electrical Safety, Sensor: Class I, Pollution Deg. 3; Transmitter: Class I, Pollution Deg. 2; Installation Cat. II.
Applications
The Saunders Body PR-23-W and Teflon Body PR-23-M Refractometers provide accurate means for measuring liquid concentrations in chemically aggressive solutions that corrode, foul or otherwise destroy metal parts as well as in ultra-pure fine chemical processes, where metal parts cannot be used.
- CHLOR-ALKALI INDUSTRY
- CORROSIVE CHEMICALS
- ULTRA PURE FINE CHEMICALS
- ELECTRONIC CHEMICALS
Acetic acid CH3COOH, Ammonium fluoride NH4F, Ammonium hydroxide NH4OH, Ammonium sulphate (NH4)2SO4
Calcium hypochlorite Ca(ClO)2, Copper chloride CuCl2, Citric acid C6H8O7, Chromic acid CrO3
Ferric chloride FeCl2, Fluosilic acid, Formic acid HCO2H
Hydrochloric acid HCl, Hydrofluoric acid HF, Hydrogen peroxide H2O2, Buffered HF (BHF), Aqua Regia HNO3/HCl
Lactic acid C2H4(OH)COOH
Magnesium chloride MgCl2, Nickel chloride NiCl2, Nitric acid HNO3
Phosphoric acid H3PO4, Potassium carbonate K2CO3 · 11/2 H2O, Potassium hydroxide KOH, Potassium thiocyanate KSCN, Potassium nitrate KNO3
Sodium bicarbonate NaHCO3, Sodium carbonate Na2CO3, Sodium chloride NaCl, Sodium dichromate Na2Cr2O7 · 2H2O, Sodium hydroxide NaOH, Sodium hypochlorite NaClO2, Sulphuric acid H2SO4 and more.
Specifications
| Refractive Index range, standard | Full range, nD1.3200…1.5300 (corresponds to 0…100% b.w.), sapphire prism |
| Refractive Index range, option | nD 1.2600…1.4700, sapphire prism. |
| Accuracy | nD± 0.0002, typically corresponds to ± 0.1% b.w. Repeatability nD± 0.0001, typically corresponds to ±0.05% b.w.) |
| Speed of response | 1s undamped, damping time selectable up to 5 min |
| Patented CORE-Optics | No mechanical adjustments and digital measurement with 3648 pixel CCD element, sodium D-line light emitting diode (LED), built-in Pt-1000 temperature sensor |
| Temperature compensation | Automatic, digital compensation |
| Instrument verification | With standard nD liquids and the documented procedure (ISO 9000) |
| Ambient temperature | Sensor: -20 °C…45 °C (-4 °F…113 °F); Indicating transmitter: 0 °C…45 °C (32 °F…122 °F) |
| Process temperature | -20 °C…130 °C (-4 °F… 266 °F) |
| Sensor protection class | IP67, Nema 4X |
| Approvals for hazardous locations | -20 °C…130 °C (-4 °F… 266 °F) |
| Sensor protection class | Non-Sparking/Non-Incendive version: ATEX certified for Zone 2 area, Ex II 3 G, EEx nA IIC T4 Gc; FM certified for Class I, Div. 2, Groups A, B, C & D hazardous locations, T6; CSA certified for Class I, Div. 2, Groups A, B, C & D, T4; IECEx certified, Ex nA IIC T4 Gc Intrinsically safe version: ATEX certified for Zone 0 area, Ex II 1 G, EEx ia IIC T4 Ga; FM certified for Class I, Div. 1, Groups A, B, C & D, T4 (for U.S.A. and Canada); IECEx certified, Ex ia IIC T4 Ga |
| Approval for electrical safety | -20 °C…130 °C (-4 °F… 266 °F) |
| Sensor protection class | cCSAus certified, Equipment Class I, Poll. Deg. 2 / Transmitter, Poll. Deg. 3 / Sensor, Install. Cat. II |
| SENSOR PR-23-W | Process connection with ETFE (Ethylene tetrafluoroethylene) lined Saunders (diaphragm) valve body 2″, 3″ or 4″; valve body material Graphite cast iron |
| Saunders body process connection | DIN-flange DN50 PN 16/DIN-flange DN80 PN 16/DIN-flange DN100 PN 16/ANSI-flange 4″ 150 lbs/ANSI-flange 3″ 150 lbs/ANSI-flange 2″ 150 lbs / JIS-flange 10k 50A/ JIS-flange 10k 80A/ JIS-flange 10k 100A |
| Sensor wetted parts | ETFE (Ethylene tetrafluoroethylene) lining, prism gasket Teflon® PTFE, prism sapphire, O-ring Kalrez, adaptor sapphire |
| Sensor weight | with 2″ Saunders body 15 kg (33 lbs)/3″ 26 kg (57 lbs)/4″ 33 kg (73 lbs) |
| Process pressure | max. 10 bar (145 psi) |
| SENSOR PR-23-M | Process connection with Thread G1/2″ (F) or Thread NPT 1/2″ (F) |
| Sensor wetted parts | Teflon® PTFE or Kynar® PVDF (Polyvinylidenefluoride), prism gasket Teflon® PTFE, prism sapphire, O-ring Kalrez, adaptor sapphire |
| Sensor weight | 5.5 kg (12 lbs) |
| INDICATING TRANSMITTER DTR | |
| Display | 320×240 pixel graphical LCD with LED backlight, keypad with 8 membrane keys |
| Current output | Two independent current outputs, 4-20 mA, max. load 1000 Ohm, galvanic isolation 1500 VDC or AC (peak), hold function during prism wash |
| Fieldbus and industrial Ethernet connectivity | Through Fieldbus converter to Modbus/TCP, Modbus RTU and Ethernet/ IP networks |
| Power | AC input 100-240 VAC/50-60 Hz, optional 24 VDC, 30 VA |
| Alarms/Wash relays | Two built-in signal relays, max. 250 V/3 A |
| Sensor connectivity | One or two sensors can be connected to one DTR. Sensors independent with own parameter sets and usable in different applications. Two current outputs configurable independently to indicate process concentration or temperature of either sensor |
| Indicating transmitter weight | 4.5 kg (10 lbs) |
| Transmitter protection class | Polycarbonate enclosure IP66, Type 4X (indoor use); AISI 304 Stainless steel enclosure IP66 (Indoor use) |
| INTERCONNECTING CABLE | IEC 61158-2 compliant two-wire cable |
| Interconnecting cable length | Standard 10 m (33 ft), max. 200 m (660 ft). Cable fittings to Indicating transmitter: European cable glands M20x1.5 or US conduit hubs |
Source: Vaisala K-Patents
