JPH0354436A - Turbidimeter - Google Patents
TurbidimeterInfo
- Publication number
- JPH0354436A JPH0354436A JP1191111A JP19111189A JPH0354436A JP H0354436 A JPH0354436 A JP H0354436A JP 1191111 A JP1191111 A JP 1191111A JP 19111189 A JP19111189 A JP 19111189A JP H0354436 A JPH0354436 A JP H0354436A
- Authority
- JP
- Japan
- Prior art keywords
- light
- polarizing
- section
- turbidity
- polarizing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 230000028161 membrane depolarization Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 18
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract 2
- 238000001514 detection method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は、濁度計、特に、測定対象に対して偏光解消法
を用いて濁度を計測するための濁度計に関する．
〔従来の技術〕
河川、工業用水、工場排水、上下水道等における濁度を
測定するために、偏光解消法を用いた濁度計が用いられ
る．
従来の偏光解消法を用いた濁度計は、発光部と、発光部
側の偏光部と、受光部と、受光部側の偏光部とを有して
いる．偏光解消法による濁度を計測するため、この濁度
計では、受光部として２個の光導電セルが用いられてい
る．一方の光導電セルは、ある振動面を持つ光の強度を
計測し、他方の光導電セルはそれと垂直方向の振動面を
持つ光の強度を計測する．そして、両光導電セルによっ
て測定された光の強度の比をとることにより偏光解消度
を計算し、それに基づいて濁度を求める。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a turbidity meter, and particularly to a turbidity meter for measuring turbidity of a measurement object using a depolarization method. [Prior art] Turbidity meters that use a depolarization method are used to measure turbidity in rivers, industrial water, factory wastewater, water and sewage systems, etc. A turbidimeter using the conventional depolarization method has a light emitting section, a polarizing section on the light emitting section side, a light receiving section, and a polarizing section on the light receiving section side. In order to measure turbidity using the depolarization method, this turbidity meter uses two photoconductive cells as the light receiving section. One photoconductive cell measures the intensity of light with a certain vibration plane, and the other photoconductive cell measures the intensity of light with a vibration plane perpendicular to it. Then, the degree of depolarization is calculated by taking the ratio of the light intensities measured by both photoconductive cells, and the turbidity is determined based on the ratio.
（ＳＵＳＰＨＮＤＥＤ ＳＯＬＩＤＳ ＭＯＮＩＴＯＲ
：Ａｍｅｒｉｃａｎ−Ｓｔａｎｄａｒｄ）
〔発明が解決しようとする課題〕
前記従来の濁度計では，光導電セルを２個使用する必要
がある。ところが、光導電セルには感度のばらつきがあ
るため、両者間の感度を調節する必要が生じる。しかも
、それらの受光素子の感度は温度に依存するため、温度
係数が同一の受光素子を選定したり、受光素子の温度補
正を行う必要が生じる。このような調整を行わなければ
、受光素子の感度のばらつきのため、正確な濁度を求め
ることができない。(SUSPHNDED SOLIDS MONITOR
(American-Standard) [Problems to be Solved by the Invention] In the conventional turbidity meter, it is necessary to use two photoconductive cells. However, since photoconductive cells have variations in sensitivity, it is necessary to adjust the sensitivity between the two. Furthermore, since the sensitivity of these light receiving elements depends on temperature, it is necessary to select light receiving elements with the same temperature coefficient or to perform temperature correction on the light receiving elements. Without such adjustment, accurate turbidity cannot be determined due to variations in sensitivity of the light receiving elements.
本発明の目的は、受光素子の感度のばらつきの調整が不
要となり、低コストで製造できる濁度計を提供すること
にある。An object of the present invention is to provide a turbidity meter that does not require adjustment of variations in sensitivity of light-receiving elements and can be manufactured at low cost.
〔課題を解決するための手段］
本発明に係る濁度計は、測定対象に対して偏光解消法を
用いて濁度を計測するための濁度計である。[Means for Solving the Problems] A turbidity meter according to the present invention is a turbidity meter for measuring turbidity of a measurement target using a depolarization method.
この濁度計は、測定対象に光を照射するための発光部と
、測定対象と発光部との間に配置された発光側偏光部と
、測定対象からの光を受ける受光部と、受光部と測定対
象との間に配置された受光側偏光部と、通過光の振動方
向を変更するために、発光側偏光部と受光側偏光部との
少なくとも一方を駆動する駆動部とを備えている．
〔作用］
まず、両偏光部を、たとえば通過光の振動面が平行とな
るようにセットする。発光部を発光させると、その光の
うち発光側偏光部が許容するある振動面を有する光のみ
が測定対象に入射し、測定対象の濁度に応じて散乱する
。測定対象からの光は受光側偏光部に入射し、前記振動
面と平行な振動戒分の光が受光部に到達するので、その
強度を計測する。This turbidity meter consists of a light-emitting part for irradiating light onto the measurement target, a light-emitting side polarizing part placed between the measurement target and the light-emitting part, a light-receiving part that receives light from the measurement target, and a light-receiving part. and a light-receiving side polarizing section disposed between the light-emitting side polarizing section and the measurement target, and a driving section that drives at least one of the light-emitting side polarizing section and the light-receiving side polarizing section in order to change the vibration direction of the passing light. ．． [Operation] First, both polarizing sections are set so that, for example, the vibration planes of the passing light are parallel to each other. When the light emitting section emits light, only the light having a certain vibration plane allowed by the light emitting side polarizing section enters the measurement object and is scattered according to the turbidity of the measurement object. The light from the object to be measured enters the light-receiving side polarizing section, and since the light whose vibration is parallel to the vibration plane reaches the light-receiving section, its intensity is measured.
次に、発光側偏光部と受光側偏光部との振動面が直交す
るように、駆動部によって偏光部を駆動する。そして、
上述と同様に受光部による計測を行う。Next, the polarizing section is driven by the driving section so that the vibration planes of the light emitting side polarizing section and the light receiving side polarizing section are perpendicular to each other. and,
Measurement is performed using the light receiving section in the same manner as described above.
受光部で得られた２種類の計測値の比を計算すれば、濁
度を求めることができる。この場合には、駆動部によっ
て発光側偏光部と受光側偏光部との間の振動面の関係を
変更することができるので、一つの受光部によって平行
な偏光面による計測及び直交する偏光面による計測を行
うことができる。Turbidity can be determined by calculating the ratio of two types of measured values obtained by the light receiving section. In this case, the relationship between the vibration planes between the light-emitting side polarizer and the light-receiver side polarizer can be changed by the drive unit, so one light-receiver can measure measurements using parallel polarization planes and measurements using orthogonal polarization planes. Measurements can be taken.
したがって、受光素子間の感度のばらつきは問題になら
なくなり、安価に濁度計を製造することが可能となる。Therefore, variations in sensitivity between light-receiving elements are no longer a problem, and the turbidity meter can be manufactured at low cost.
本発明の一実施例の概略を第１図に示す．第１図におい
て、濁度計は、測定槽ｌ内に溜められた液体試料２に光
を照射するための発光ユニット３と、液体試料２からの
光を受ける受光ユニット４とを主として有している。そ
して、これらのユニットは、第３図に示すようなマイク
ロコンピュータ５に接続され、制御されるようになって
いる。An outline of one embodiment of the present invention is shown in Fig. 1. In FIG. 1, the turbidity meter mainly includes a light emitting unit 3 for irradiating light onto a liquid sample 2 stored in a measurement tank l, and a light receiving unit 4 for receiving light from the liquid sample 2. There is. These units are connected to and controlled by a microcomputer 5 as shown in FIG.
発光ユニット３は、ランプから構成される光源６と、光
ａ６からの光を集光するための集光レンズ７と、集光レ
ンズ７の前方に順に配置されたコリメートレンズ８．色
ガラスフィルター９．偏光４ｋ Ｉ Ｏとを備えている
。偏光板１０は、たとえば第ｔ図の紙面と平行な振動面
を有する光のみを通過させるようになっている。偏光板
ＩＯを通過した光は、液体試料２の上面から斜めに液体
試料２内に照射する。The light emitting unit 3 includes a light source 6 composed of a lamp, a condensing lens 7 for condensing light from the light a6, and a collimating lens 8 disposed in this order in front of the condensing lens 7. Colored glass filter9. It is equipped with polarized 4K IO. The polarizing plate 10 is configured to allow only light having a vibration plane parallel to the plane of the paper in FIG. t to pass through, for example. The light that has passed through the polarizing plate IO is irradiated into the liquid sample 2 obliquely from the top surface of the liquid sample 2 .
受光ユニシト４は、液体試料２側に配置された偏光板１
ｌと、その後方に配置された受光素子１２とを主として
有している。偏光板１１と液体試料２との間には、外部
からの光を遮断するための筒体１３が配置されている。The light receiving unit 4 includes a polarizing plate 1 placed on the liquid sample 2 side.
1 and a light receiving element 12 arranged behind it. A cylinder 13 is arranged between the polarizing plate 11 and the liquid sample 2 to block light from the outside.
偏光板ＩＩは、円板ｌ４の中心部に形威された孔内に嵌
め込まれている。円板１４は図示しない支持部によって
回転自在に支持されている。偏光板ｌ１の外方側におい
て、円板ｌ４には筒状のギア１５が設けられている。ギ
ア１５には、ステッピングモータ１６０回転軸がギアｌ
７を介して連結されている。第２図に示すように、円板
ｌ４の外周部には、円板１４の中心を中心として直角方
向に配置された平行位置検出センサｌ８と垂直位置検出
センサ１９とが設けられている。両センサ１Ｂ，１９は
光電センサであり、それらの受光部及び発光部（図示せ
ず）は円板１４を介して互いに対向する位置に配置され
ている。一方、円仮ｌ４の外周部には、同一直径方向に
１対のスリット２０が配置されている。このスリット２
０がセンサ１８，１９に一敗したときに、センサ１８，
１９では光が通過し、それによって円板１４の回転位置
が検出される。Polarizing plate II is fitted into a hole formed in the center of disk l4. The disk 14 is rotatably supported by a support portion (not shown). A cylindrical gear 15 is provided on the disk l4 on the outer side of the polarizing plate l1. The rotating shaft of the stepping motor 160 is connected to the gear 15.
They are connected via 7. As shown in FIG. 2, a parallel position detection sensor l8 and a vertical position detection sensor 19 are provided on the outer periphery of the disc l4, which are arranged perpendicularly to the center of the disc 14. Both sensors 1B and 19 are photoelectric sensors, and their light receiving sections and light emitting sections (not shown) are arranged at positions facing each other with a disc 14 in between. On the other hand, a pair of slits 20 are arranged in the same diametrical direction on the outer periphery of the circle l4. This slit 2
When 0 loses to sensors 18 and 19, sensors 18 and 19
At 19, light passes through which the rotational position of the disk 14 is detected.
測定槽ｌは、外槽１ａと内槽１ｂとを有している。両槽
１ａ，ｌｂはともに上端が開口状態にある。内槽１ｂの
底面には液体試料導入口ＩＣが設けられており、外槽１
ａの底面には液体試料導出口１ｄが設けられている。The measurement tank 1 has an outer tank 1a and an inner tank 1b. Both tanks 1a and lb are open at their upper ends. A liquid sample inlet IC is provided at the bottom of the inner tank 1b, and a liquid sample inlet IC is provided at the bottom of the inner tank 1b.
A liquid sample outlet 1d is provided on the bottom surface of a.
第３図に示すように、マイクロコンピュータ５は、ＣＰ
Ｕ３ ０、ＲＡＭ３ １、ＲＯＭ３ ２等から構威され
ている。マイクロコンピュータ５のＩ／Ｏボート３３に
は、上述の受光素子１２、平行位置検出センサｌ８、垂
直位置検出センサ１９及びその他の入力部が接続されて
いる。また、Ｉ／Ｏボート３３には、光源６、モータ１
６に加えて、演算結果を表示するためのＣＲＴやＬＥＤ
等からなる表示部３４及びその他の出力部が接続されて
いる。As shown in FIG. 3, the microcomputer 5 has a CP
It is configured from U30, RAM31, ROM32, etc. The I/O boat 33 of the microcomputer 5 is connected to the above-mentioned light receiving element 12, parallel position detection sensor 18, vertical position detection sensor 19, and other input sections. The I/O boat 33 also includes a light source 6 and a motor 1.
In addition to 6, CRT and LED for displaying calculation results
A display section 34 and other output sections are connected thereto.
次に、上述のマイクロコンピュータ５により制御される
濁度計の動作を説明する．
液体試料２は、導入口ＩＣから内槽１ｂ内に入り、そこ
から溢れ出て導出口１ｄから外部に導出される。Next, the operation of the turbidity meter controlled by the above-mentioned microcomputer 5 will be explained. The liquid sample 2 enters the inner tank 1b through the inlet IC, overflows from there, and is led out to the outside through the outlet 1d.
一方、光源６からの光は、集光レンズ７、コリメートレ
ンズ８を通って平行光束になる。この光は、色ガラスフ
ィルター９及び偏光板１０を通り、たとえば第１図の紙
面と平行な振動成分のみの光となって液体試料２に入射
する。On the other hand, the light from the light source 6 passes through a condensing lens 7 and a collimating lens 8 to become a parallel beam of light. This light passes through a colored glass filter 9 and a polarizing plate 10, and enters the liquid sample 2 as light having only vibrational components parallel to the paper plane of FIG. 1, for example.
ここで、円板ｌ４の姿勢が第２図に示す姿勢であり、こ
のときの偏光板１１の振動面は偏光板１０の振動面と直
角であるとすると、試料２により散乱された光のうち第
１図の紙面と直角な振動成分のみが偏光板１１を通って
受光素子１２に入射する。この場合の受光素子ｌ２に生
じる電位を第４図の■１とする。この電位■，は、第３
図のマイクロコンピュータ５にディジタル信号として入
力され記憶される。なお、入射光は偏光板１０で制限さ
れた振動成分しか有さないので、液体試料２の濁度がＯ
であれば液体試料２からの光は当該振動威分のみを有す
る。一方、試料２中に濁度があれば、粒子が等方性でな
いことにより、当該振動威分の他にそれと垂直な振動戒
分も生じる。すなわち、これによって偏光解消が起こる
。Here, assuming that the attitude of the disk l4 is the attitude shown in FIG. Only vibration components perpendicular to the plane of FIG. 1 pass through the polarizing plate 11 and enter the light receiving element 12. The potential generated in the light-receiving element l2 in this case is assumed to be 1 in FIG. This potential ■, is the third
The signal is input as a digital signal to the microcomputer 5 shown in the figure and is stored. Note that since the incident light has only vibrational components limited by the polarizing plate 10, the turbidity of the liquid sample 2 is
If so, the light from the liquid sample 2 has only the vibrational power. On the other hand, if there is turbidity in the sample 2, since the particles are not isotropic, in addition to the vibrational force, a vibrational force perpendicular to the vibrational force is also generated. That is, this causes depolarization.
次に、モータｌ６により円板ｌ４を９０゜回転させる。Next, the disk l4 is rotated by 90 degrees by the motor l6.
これによって、偏光板ｌ１の振動面は偏光Ｆｉ．１０の
振動面と平行になる。この場合には、試料２により散乱
された光のうち紙面と平行な振動威分のみが、偏光板１
１を通って受光素子１２に入射する。このときの受光素
子１２に入射する電位第４図に示すようにＶ２とする。As a result, the vibration plane of the polarizing plate l1 becomes polarized light Fi. It becomes parallel to the vibration plane of 10. In this case, of the light scattered by the sample 2, only the vibration component parallel to the plane of the paper is transmitted to the polarizing plate 1.
1 and enters the light receiving element 12. At this time, the potential incident on the light receiving element 12 is set to V2 as shown in FIG.
この電位■２は、マイクロコンピュータ５にディジタル
信号として入力され記憶される。This potential (2) is input to the microcomputer 5 as a digital signal and stored.
ここでは、円板１４を連続的に回転させ、スリット２０
とセンサ１８，１９との対応位置のタイミングを検出し
、そのときの受光素子１２からの電位をマイクロコンピ
ュータ５に記憶する。円板ｌ４を９０゜ずつ間欠的に回
転させ、これによって、偏光板１ｌの振動面を第１図の
紙面と平行あるいは紙面と直角方向に正確に一致させる
構成としてもよい。Here, the disk 14 is continuously rotated and the slit 20
The timing of the corresponding positions of the sensors 18 and 19 is detected, and the potential from the light receiving element 12 at that time is stored in the microcomputer 5. The disc l4 may be rotated intermittently by 90 degrees, thereby making the vibration plane of the polarizing plate 1l accurately aligned parallel to or perpendicular to the plane of the paper in FIG.
受光素子１２に入射した第１図の紙面と平行な振動或分
の光の強さと、垂直な振動戊分の光の強さとに関するデ
ータは、偏光板１１の偏光面を９０゜ずつずらすことに
よって所定回数計測され、そのデータはマイクロコンピ
ュータ５に記憶される。それらのデータからそれぞれ平
均値が計算され、それらの平均値が第１図の紙面に垂直
な振動威分の光の強さ■と紙面に平行な振動成分の光の
強さＪとされる。そして、偏光解消度が、Ｉ／Ｊで与え
られる。Data regarding the intensity of a certain portion of the light that oscillates parallel to the plane of the paper in FIG. The measurement is performed a predetermined number of times, and the data is stored in the microcomputer 5. Average values are calculated from each of these data, and these average values are used as the light intensity (■) of the vibration component perpendicular to the plane of the paper in FIG. 1 and the light intensity J of the vibration component parallel to the plane of the paper in FIG. The degree of depolarization is then given by I/J.
濁度が大きくなれば、一度散乱された光が次の粒子で再
び散乱される回数が増えて偏光解消度が大きくなり、つ
いには１となる。したがって、偏光解消度を測定するこ
とによって濁度を求めることができる。As the turbidity increases, the number of times that light that has been scattered once is scattered again by the next particle increases, and the degree of depolarization increases, eventually reaching 1. Therefore, turbidity can be determined by measuring the degree of depolarization.
このように、上述の実施例では、円仮ｌ４を回転させる
ことによって、偏光板１１の振動面を変更するので、受
光ユニット４は１個の受光素子１２のみで足りることに
なる。したがって、受光ユニット４における受光素子１
２を複数設ける必要がなくなり、受光素子間で感度の調
整を行う必要がなくなる．
〔他の実施例〕
（ａ）上述の実施例では、受光ユニット４側の偏光板１
１を回転させたが、発光ユニット３側の偏光板１０を回
転させることにより本発明を同様に実施することができ
る．
中）偏光板１０．１１に代えて偏光プリズムを用いても
よい。In this way, in the above-described embodiment, the vibration plane of the polarizing plate 11 is changed by rotating the circle 14, so that the light receiving unit 4 only needs one light receiving element 12. Therefore, the light receiving element 1 in the light receiving unit 4
There is no need to provide multiple light receiving elements, and there is no need to adjust the sensitivity between the light receiving elements. [Other embodiments] (a) In the above embodiment, the polarizing plate 1 on the light receiving unit 4 side
1, the present invention can be implemented in the same manner by rotating the polarizing plate 10 on the light emitting unit 3 side. Middle) A polarizing prism may be used in place of the polarizing plates 10 and 11.
（Ｃ）測定槽ｌとしては種々の形態のものが使用できる
．たとえば、測定用の槽として特別の経路を設けず、液
体処理系内に適宜濁度計を配置することも可能である。(C) Various types of measurement tanks can be used. For example, it is also possible to appropriately arrange a turbidity meter within the liquid treatment system without providing a special path as a measurement tank.
たとえば、第５図に示すように、液体試料２が通過する
透明なパイプ４０の外側に濁度計を配置し、バイブ４０
を介してその中の液体試料２の濁度を計測することも可
能である。For example, as shown in FIG. 5, a turbidity meter is placed outside a transparent pipe 40 through which the liquid sample 2 passes, and a vibrator 40
It is also possible to measure the turbidity of the liquid sample 2 therein via.
本発明に係る濁度計によれば、発光部側偏光部と受光部
側偏光部との少なくとも一方を駆動部で駆動するように
したので、１個の受光部で足りるようになり、受光部間
の感度の調整が不要になる．したがって、本発明によれ
ば、構戒が爾素化し、安価に濁度計を製造することが可
能になる。According to the turbidity meter according to the present invention, at least one of the light-emitting section side polarizing section and the light-receiving section side polarizing section is driven by the drive section, so one light-receiving section is sufficient, and the light-receiving section There is no need to adjust the sensitivity between Therefore, according to the present invention, the construction is simplified and it becomes possible to manufacture a turbidity meter at low cost.
第１図は本発明の一実施例の縦断面概略図、第２図はそ
の円板部分の平面概略図、第３図はその制御部の概略ブ
ロック図、第４図は受光素子における発生電位の変化を
示すグラフ、第５図は他の実施例の縦断面概略図である
。
２・・・液体試料、６・・・光源、１０・・・偏光板、
１１・・・偏光板、１２・・・受光素子、１４・・・円
板、１６・・・モータ。Fig. 1 is a schematic vertical cross-sectional view of one embodiment of the present invention, Fig. 2 is a schematic plan view of the disk portion thereof, Fig. 3 is a schematic block diagram of the control section, and Fig. 4 is the potential generated in the light receiving element. FIG. 5 is a schematic vertical cross-sectional view of another embodiment. 2...Liquid sample, 6...Light source, 10...Polarizing plate,
DESCRIPTION OF SYMBOLS 11... Polarizing plate, 12... Light receiving element, 14... Disk, 16... Motor.
Claims (1)
するための濁度計であって、 前記測定対象に光を照射するための発光部と、前記測定
対象と前記発光部との間に配置された発光側偏光部と、 前記測定対象からの光を受ける受光部と、 前記受光部と前記測定対象との間に配置された受光側偏
光部と、 通過光の振動方向を変更するために、前記発光側偏光部
と前記受光側偏光部の少なくとも一方を駆動する駆動部
と、 を備えた濁度計。(1) A turbidity meter for measuring turbidity of a measurement target using a depolarization method, comprising: a light-emitting part for irradiating light to the measurement target; and a connection between the measurement target and the light-emission part. a light-emitting-side polarizing section disposed between the light-emitting side polarizer, a light-receiving section that receives light from the measurement object, and a light-receiving-side polarization section disposed between the light-receiving section and the measurement object; a driving section that drives at least one of the light-emitting side polarizing section and the light-receiving side polarizing section in order to change the turbidity meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1191111A JPH0354436A (en) | 1989-07-24 | 1989-07-24 | Turbidimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1191111A JPH0354436A (en) | 1989-07-24 | 1989-07-24 | Turbidimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0354436A true JPH0354436A (en) | 1991-03-08 |
Family
ID=16269042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1191111A Pending JPH0354436A (en) | 1989-07-24 | 1989-07-24 | Turbidimeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0354436A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039497A1 (en) | 2005-10-05 | 2007-04-12 | Swan Analytische Instrumente Ag | Photometric method and apparatus for measuring a liquid's turbidity, fluorescence, phosphorescence and/or absorption coefficient |
| CN105572051A (en) * | 2015-12-17 | 2016-05-11 | 南京信息工程大学 | Polarized water turbidity measurement device, system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511182A (en) * | 1974-06-21 | 1976-01-07 | Yamatake Honeywell Co Ltd | KONDAKUEKINONODOSOKUTEISOCHI |
-
1989
- 1989-07-24 JP JP1191111A patent/JPH0354436A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511182A (en) * | 1974-06-21 | 1976-01-07 | Yamatake Honeywell Co Ltd | KONDAKUEKINONODOSOKUTEISOCHI |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039497A1 (en) | 2005-10-05 | 2007-04-12 | Swan Analytische Instrumente Ag | Photometric method and apparatus for measuring a liquid's turbidity, fluorescence, phosphorescence and/or absorption coefficient |
| US7658884B2 (en) | 2005-10-05 | 2010-02-09 | Swan Analytische Instrumente Ag | Photometric method and apparatus for measuring a liquid's turbidity, fluorescence, phosphorescence and/or absorption coefficient |
| US9778179B2 (en) * | 2005-10-05 | 2017-10-03 | Swan Analytische Instrumente Ag | Photometric method and apparatus for measuring a liquid's turbidity, fluorescence, phosphorescence and/or absorption coefficient |
| CN105572051A (en) * | 2015-12-17 | 2016-05-11 | 南京信息工程大学 | Polarized water turbidity measurement device, system and method |
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