PH21 pH Sensor with Integral Pt1000 for Accurate Temperature and 0-14 pH Range in 0-60°C Environments

At Yokogawa, we are committed to our responsibility of protecting the environment, and this sensor is the first step to achieving a zero emission future. The PH21 is the first pH sensor made from recycled PPS-GF40 materials without compromising the sensor body integrity. The PH21 was designed with the drinking water market in mind, where simplicity results in accuracy and reliable pH measurement, making this sensor an excellent choice in 80% of water-based applications.
Features and Benefits

• Available as analog and digital SMART sensors (SENCOM)
• Integral Pt1000 element for accurate temperature measurements and enhanced pH accuracy
• Quick disconnect Variopin connector
• Simple maintenance by comprehensive design
• Versatile Direct in-line, immersion, off-line installation (flow fitting) and retractable Hot-tap
• Quick-Release adapter available
• Calibration certificate delivered with each sensor

Measuring elements
pH glass electrode
Silver Chloride reference
Pt1000 temp sensor
Wetted parts
Sensor body: PPS
Measuring sensor: G-Glass
O-ring: Viton
Reference junction: PTFE
Functional specifications (at 25°C)
Isothermal point: pH7
Reference system: Ag/AgCl
Glass impedance: 100-3000 MΩ
Junction resistance: < 1 KΩ
Temperature element: Pt1000 IEC 751
Asymmetry potential: < 5 mV
Linearity pH Slope: ≥96% in pH 2 - 12
Dynamic specifications (at 25°C)
Response time pH step 7 to 4: 15 sec for 90%
Response time temp step, 10°C: 180 sec
Stabilization time (0.02 pH unit 10 s): < 2 minutes
Operating rangepH: 0 - 14 pH
Temperature: 0°C... +60°C (32°F... 140°F)
Pressure (at 25°C): 0 to 5 Bar (0 to 72 PSIG)
Pressure (at 70°C): 0 to 5 Bar (0 to 72 PSIG)
Conductivity: > 50 µS/cm

Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of  measuring instruments , located in China xi’an City. Since 2008, Xi'an Kacise focused on the development and production of pressure, level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical and management personnel, through efforts of our entire staff, we have become a professional measuring instrument manufacturer and solution provider. And we are continuously trying to improve product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE, intrinsic safety explosion-proof and isolated safety explosion-proof certificates, etc. which ensure that our products comply with international standards.

Kacise sensors have already been exported to America, Spain, Australia, Chile and 20 other countries and regions, and received many favorable feedbacks. Our overseas distributers are also increasing. We regard “reasonable prices, efficient production time and good after-sales service” as our tenet, and hope to cooperate with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices, and provides industry-leading customer service. We personally get to know each of our customers, and we know how to discover the most valuable part of our business , to help others achieve their goals.