Apparatus for measuring ionic concentration in two measurement configurations

• US 5,200,706 A
• Filed: 04/08/1991
• Issued: 04/06/1993
• Est. Priority Date: 04/09/1990
• Status: Expired due to Fees

• Current Assignee: Horiba Limited 2 Miyanohigashi-Machi Kissyoin Minami-Ku Kyoto Japan
• Original Assignee: Horiba Limited
• Inventors: Yada, Takaaki
• Primary Examiner(s): Harvey, Jack B.
• Assistant Examiner(s): BROWN, GLENN WARNER
• Application Number:
  US07/681,729
• Time in Patent Office: 729 Days
• Field of Search: 324/438, 324/439, 324/441, 324/446, 324/450, 422/82.03, 422/82.02
• US Class Current: 324/446
• CPC Class Codes: G01N 27/283 Means for supporting or introducing electrochemical probes

Abstract

A device for measuring ionic concentration in a sample liquid, having a detachable waterproof electrode housing. A body member has a computing device disposed therein and a display panel on an exterior surface. The waterproof electrode housing is demountably coupled to the body member. The electrode housing includes a flat surface sensor capable of measuring ionic concentration of the sample liquid when the device is placed on a flat surface, and is waterproof for measuring ionic concentration by immersion. A gap is formed between the body and the flat surface for preventing water from entering the body when the flat surface ionic concentration measurement procedure is being conducted.

Claims

1. An apparatus for measuring ionic concentration in a sample liquid comprising:

a body; and

measuring means attached to the body for measuring the ionic concentration of the sample liquid and producing a signal representative of the measured concentration, the measuring means including a sensor means having a substantially flat surface sensor including a plurality of laminated substrates and a printed circuit interposed between a center and a lowermost substrate, the measuring means operative in a first position by placing the sample on the measuring means when the body is on a substantially flat surface and operative in a second position by immersing the measuring means within the sample.

2. The apparatus of claim 1, wherein the measuring means is detachable from the body.

3. The apparatus of claim 2, wherein the measuring means is a waterproof electrode housing slidably detachable to the body.

4. The apparatus of claim 1 wherein the measuring means is a waterproof electrode detachably coupled to the body.

5. The apparatus of claim 4 wherein the flat sensor means measures the sample liquid when the apparatus is placed on a flat surface, the electrode being waterproof for immersion into a sample liquid.

6. The apparatus of claim 1, wherein the body includes a power supply, computing means, and a display panel to produce a representative display of the measured ionic concentration.

7. The apparatus of claim 6, wherein the body further includes control means for allowing operation, input, and memory.

8. The apparatus of claim 1, wherein an immersion line is marked on the apparatus to show the maximum level of immersion in the second operative position.

9. The apparatus of claim 1, wherein a lifting means is affixed to a bottom surface of the body to elevate the body above any liquid on the flat surface.

10. The apparatus of claim 9, wherein the lifting means is a clip adaptable to hold the apparatus in place.

11. The apparatus of claim 1, wherein a temperature compensating means is incorporated within the measuring means.

12. An apparatus for measuring ionic concentration in a sample liquid, comprising:

a body including a computing means;

a detachably mounted electrode housing mounted upon the body, the electrode housing being waterproof to prevent fluid from entering the housing or the body during measurement in several measurement configurations, the electrode housing including a flat sensor housing having a sensing electrode, the sensing electrode adapted to measure the ionic concentration of the sample liquid in the several measurement configurations including;

a first measurement configuration when the flat sensor housing is immersed within the sample liquid; and

a second measurement configuration when the body including the mounted electrode housing is placed upon a flat surface and the sample liquid is disbursed upon the sensing electrode; and

a lifting means affixed to the body such that a small gap is formed between the body and the flat surface in the second configuration when the apparatus is undergoing a flat surface measurement, the small gap being sufficiently large to prevent fluid on the flat surface from entering the body and damaging the computing means.

13. An apparatus for measuring ionic concentration in a sample liquid, comprising:

a body including a computing means;

a detachably mounted electrode housing including a flat sensor housing having a sensing electrode, the sensing electrode adapted to measure the ionic concentration of the sample liquid when the flat sensor housing is immersed therein, and the sensing electrode adapted to measure the ionic concentration of the sample liquid disbursed thereon when the apparatus is placed on a flat surface; and

a lifting means affixed to the body such that a small gap is formed between the body and the flat surface on which the body is placed when undergoing a flat surface measurement, the small gap being sufficiently large to prevent fluid on the flat surface from entering the body and damaging the computing means.

14. The apparatus for measuring ionic concentration of claim 13, wherein the sensing electrode comprises a plurality of laminated substrates having a printed circuit interposed between a center substrate and a lowermost substrate.

15. The apparatus for measuring ionic concentration of claim 14, wherein a temperature-compensating element is disposed in the printed circuit.