这个产品是无效的.
| Services Available |
|---|
概览
CS526探头采用最先进的ISFET技术测量pH值。没有玻璃泡，使得该传感器更安全更耐用。可在极端的pH条件下提供更优的测量。CS526不需要维护就可以使用更长的时间；易于清洁，可以以干燥方式保存。
优势与特点
- Innovative ISFET pH-sensing element
- Easily cleaned
- More rugged than the traditional glass electrode pH probes
- Each sensor individually tested
- Designed and manufactured under stringent quality control conditions in an ISO 9001 environment
- CE compliant
图像
相似产品
技术说明
CS526采用SENTRON的高科技的离子敏感场效应晶体管（ISFET）半导体作为它的pH感应元件，并且包含 银/氯化银-氯化钾参考系统。ISFET技术是当今最强大的pH监测技术，它相当程度地减小了极端pH条件下的酸性或碱性的数值误差。CS526可以监测含有高固体组分、腐蚀性化学品、或者容易阻塞或污染传统的玻璃泡pH计的生物体的液体的pH值。
CS526的耐用设计，使得它适合任何液体的pH值监测应用，从实验室到严酷的野外应用。探头的电子单元安全地封装在耐用的PEEK外壳里。不需要玻璃泡，也消除了玻璃破碎的可能性，使得CS526更耐用更安全。
产品规格
| pH Range | 2 to 12 |
| Power Requirements | 5 Vdc |
| Current Consumption | 15 mA (maximum) |
| Accuracy | ±0.2 pH (over 10° to 40°C) |
| Operating Temperature Range | 10° to 40°C |
| Output |
|
| 24 h Drift | < 0.15 pH (after 15 min. soak in pH 7 at 25°C) |
| Allowed Water Pressure | 0 to 700 kPa (0 to 101.5 psi) |
| Cable Type | Three-twisted pair, 24 AWG cable with Santoprene jacket |
| Sensor Material | Polyetheretherketone (PEEK) |
| Maximum Cable Length | 100 m (328 ft) |
| Diameter | 16 mm (0.63 in.) |
| Length | 102 mm (4 in.) |
| Weight | 318 g (11.2 oz) with 3.05 m (10 ft) cable |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
相关技术文档
常见问题解答
CS526-L: 15
展开全部收起全部
-
The CR300 and CR310 dataloggers do not support TTL logic, which is what the CS526-L sensor uses. A TTL to RS-232 converter (supplied by the user) could be used, however.
-
In an ISFET chip pH sensor, the chemical coating on the gate electrode can vary depending on the model and manufacturer of the pH sensor. Depending on which chemical coating is used and what elements are present in the sample solution, there may be some ion interference.
-
The source and the drain are two of the three electrodes contained within the ISFET chip, and they behave in much the same way. The third electrode in the ISFET chip, the gate, has an electrical field that influences the current that flows between the source and the drain. The electrical potential in the ISFET pH sensor is measured between the reference electrode and the source.
-
An ISFET chip pH sensor has three main components:
- ISFET chip—The ISFET chip is made of durable plastic and contains three electrodes: the source, the drain, and the gate. The gate is the ISFET chip’s only electrode that comes in contact with the sample solution.
- Reference electrode—Inside the reference electrode’s membrane, there is a silver wire element submersed in an electrolyte solution. The reference electrode, as a whole, is submersed in the sample solution.
- Reference junction—The reference junction is located at the end of the reference electrode by the sample solution. It interacts with both the reference electrode’s electrolyte solution and the sample solution to complete the electrical circuit.
-
Silver is the best electrical conductor of all the metals because it has the lowest electrical resistance. The silver wire, coated in silver chloride, is relatively insensitive to changes in temperature.
-
Cleaning and/or calibration may be required when the measurements are scattered, drifting occurs, or there is physical evidence of fouling. Measurements for pH must be monitored regularly to check for scattering. However, just because the results are scattered does not necessarily indicate the need for an adjustment. For example, there may be a change in the water source that causes the scattering. As a sensor ages, however, the scattering of the measured values tends to increase.
To check the performance of a pH sensor, use it to measure a buffer solution in the correct range. If the value returned is within the specified range, the sensor does not need to be calibrated.
-
A reference electrode can become contaminated when poisoning ions such as lead, iron, chrome, cyanide, or sulfide enter the reference electrode and react either with the silver wire or with the electrolyte solution.
The contamination may not become apparent until the silver-chloride coating is completely dissolved and the electrical potential from the reference electrode has changed greatly. If this occurs, the reference electrode must be replaced.
-
The CS526-L pH sensor uses an ISFET chip instead of pH-sensitive glass, which is used for many other pH sensors. The ISFET chip is a transistor coated with a chemically sensitive material. One of the ISFET chip’s electrodes (the gate) and the reference electrode are submersed in the same sample solution. A circuit path is established between the two electrodes. The difference in electrical potential between the two electrodes is directly proportional to the sample solution’s pH. Thus, by measuring the electrical potential, the pH is measured.
-
PolyEtherEtherKetone (PEEK) is a plastic material that has very good thermal stability and chemical resistance properties. This material was chosen for use in the manufacture of the CS526-L because of its natural resistance to organic acids (acetic, carbonic, citric, tartaric, etc.) and its hydrolysis resistance to fresh and saltwater.
-
In the event that both alkaline and acidic sample solutions are measured using a single pH sensor, a multipoint calibration is done using three buffer solutions. As in the two-point calibration, the first buffer solution has a 7.0 pH. The second buffer solution should be near in pH value to either the acidic or alkaline sample solution, and the third buffer solution should be near in pH value to the other.