pH Measurement & ORP Measurement in Wet Gas Scrubbers
Monitoring Scrubbing Chemical Concentration with pH & ORP
Corrosion-Resistant pH & ORP Sensors for Longer Sensor Life
In wet gas scrubbers, scrubbing effectiveness is maintained by keeping an excess concentration of the scrubbing chemical - either caustic or acid - depending on the waste gas. pH provides a measure of this concentration that can be used to control the addition of make-up chemicals. ORP measurement may also be used if the scrubbing involves an oxidation and reduction reaction. Dirty scrubbing water can plug a pH sensor or ORP sensor, leading to a shorter sensor life. The Rosemount™ 396P pH/ORP Sensor is ideal for wet gas scrubbers due to its large area reference junction that resists coating and plugging.
Click to continue reading Corrosion-Resistant pH & ORP Sensors for Longer Sensor Life
Product Solutions
The Rosemount 396P pH Sensor/ORP Sensor, with integral cable, is specifically designed for improved life in harsh, dirty, and abrasive applications such as lime slurry waste treatment, paper machine headbox and pigment/dye applications, where large quantities of suspended solids are present. The pH/ORP sensor features a coating resistant TUpH large area reference junction and a rugged polypropylene body construction for maximum chemical resistance.
- Minimum pH/ORP sensor maintenance due to TUpH reference technology which ensures steady pH signal when sensor is coated
- Maximum pH/ORP sensor life due to helical reference pathway which hinders reference poisoning and cracking resistant glass
- SMART enabled for pH measurements
Measurement Range
pH sensor: 0 to 14ORP sensor: -1500 to 1500 mV
Operating Pressure
Hemi-bulb: 0 to 150 psig (0 to 10.34 barg)Flat-bulb: 0 to 100 psig (0 to 6.89 barg)
Operating Temperature
32 - 212 °F (0 -100 °C)
The Rosemount 56 Dual Channel Transmitter is a line powered device that can accept inputs from pH/ORP sensors, ion selective electrode (ISE) sensors, flow, current, conductivity (contacting and toroidal) sensors, turbidity sensors, dissolved oxygen sensors, chlorine sensors and ozone sensors.
- Retrieve calibration and measurement information by accessing the data logger via USB
- Design efficient processes by utilizing the built-in PID controller
- At a glance view of pertinent information provided by the large customizable display
Certifications/Approvals
FM: Class I, Division 2, Groups A, B, C, & D • Class Il & lll, Division 2, Groups E, F,&G • T4
Weight
Rounded up to nearest lb or nearest 0.5 kg: 3 lbs/4 lbs (1.5 kg/2.0 kg)
Measurement Range
pH sensor: 0 to 14 pH
ORP Sensor: -1500 to +1500 mV
ORP Sensor: -1500 to +1500 mV
The 1056 dual-input transmitter offers single or dual sensor input with an unrestricted choice of dual measurements thus reducing the cost per loop and saving panel space. This multi-parameter instrument offers a wide range of measurement choices, including differential conductivity, dual oxygen and many other combinations supporting most industrial, commercial, and municipal applications. The modular design of the instrument allows signal input boards to be field replaced making configuration changes easy.
- Fast and easy installation using Quick Start programming, auto-recognition of sensor boards and modular design
- Large customizable display provides at-a-glance view of pertinent information
- Visibility of process parameters by utilizing HART® or Profibus DP digital communications
Enclosure Rating
Polycarbonate. Type 4X, IP65.
Certifications/Approvals
FM/CSA/UL (See Product Data Sheet for complete list of certifications.)
Dimensions
Overall 155 x 155 x 131mm (6.10 x 6.10 x 5.15 in.). Cutout: 1/2 DIN 139mm x 139mm (5.45 x 5.45 in.)
The 1057 three-input analyzer offers sensor input for pH/ORP/ISE or Contacting Conductivity/Resistivity. With an unrestricted choice of dual measurements, you can reduce the cost per loop and save panel space.
- Easy installation using Quick Start programming, auto-recognition of sensor boards and modular design
- At a glance view of pertinent information provided by the large customizable display
Enclosure Rating
Polycarbonate. NEMA 4X/CSA 4 (IP65)
Certifications/Approvals
CSA
Class I, Division 2, Groups A, B, C, & D
Class Il, Division 2, Groups E, F, & G
Class Ill T4A Tamb= 50°C
Class I, Division 2, Groups A, B, C, & D
Class Il, Division 2, Groups E, F, & G
Class Ill T4A Tamb= 50°C
Dimensions
Overall 155 x 155 x 131mm (6.10 x 6.10 x 5.15 in.). Cutout: 1/2 DIN 139mm x 139mm (5.45 x 5.45 in.) Minimum depth for panel mount installations 101.6 mm (4.0 in).
Rosemount 5081 Explosion-proof Transmitter is a single channel loop powered device that can accept input from pH/ORP sensors, conductivity (contacting and toroidal) sensors and amperometric (dissolved oxygen, chlorine, and ozone sensors).
- Robust explosion-proof design constructed with heavy duty cast aluminum
- Faster installation using Quick Start programming
- Intrinsically safe, non-incendive, and explosion-proof hazardous area location approvals
Measurement Range
Varies by sensor type. See Product Data Sheet for details.
Operating Temperature
-4 - 149 °F (-20 - 65 °C)
Power Supply
Minimum power supply voltage is 12 Vdc. Maximum power supply voltage is 42.4 Vdc (30 Vdc for intrinsically safe operation). Power supply voltage should cover the voltage drop on the cable plus the external load resistor required for HART® communications (250 Ω minimum).
