JPH0233326U - - Google Patents
Info
- Publication number
- JPH0233326U JPH0233326U JP11218188U JP11218188U JPH0233326U JP H0233326 U JPH0233326 U JP H0233326U JP 11218188 U JP11218188 U JP 11218188U JP 11218188 U JP11218188 U JP 11218188U JP H0233326 U JPH0233326 U JP H0233326U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- level measuring
- operational amplifier
- measuring resistor
- level
- 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
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
第１図は本考案実施例の放熱式レベルセンサを
示す回路図、第２図は実施例のセンサ部を示す図
、第３図は従来の放熱式レベルセンサの一例を示
す回路図である。
１ａ……レベル測定用抵抗体、２ａ……温度補
償用抵抗体、３……加熱用ヒータ、４……増幅器
。
FIG. 1 is a circuit diagram showing a heat dissipation type level sensor according to an embodiment of the present invention, FIG. 2 is a diagram showing a sensor section of the embodiment, and FIG. 3 is a circuit diagram showing an example of a conventional heat dissipation type level sensor. 1a... Resistor for level measurement, 2a... Resistor for temperature compensation, 3... Heater, 4... Amplifier.
Claims (1)
体を帰還抵抗とするとともに温度補償用抵抗体を
入力抵抗とした演算増幅器を備え、 上記ヒータによつてレベル測定用抵抗体を加熱
するとともに該レベル測定用抵抗体の一部を液体
に浸し、上記演算増幅器の入力端に一定電圧を印
加したときの当該演算増幅器の出力に基づいてレ
ベル測定用抵抗体に対する液面の相対位置を検出
するようにしたことを特徴とする放熱式レベルセ
ンサ。 (2) 加熱用のヒータを有するレベル測定用抵抗
体と付加抵抗とを帰還抵抗とするとともに温度補
償用抵抗体と付加抵抗とを入力抵抗とした演算増
幅器を備え、 上記ヒータによつてレベル測定用抵抗体を加熱
するとともに該レベル測定用抵抗体の一部を液体
に浸し、上記演算増幅器の入力端に一定電圧を印
加したときの当該演算増幅器の出力に基づいてレ
ベル測定用抵抗体に対する液面の相対位置を検出
するようにしたことを特徴とする放熱式レベルセ
ンサ。[Scope of Claim for Utility Model Registration] (1) An operational amplifier is provided with a level measuring resistor having a heater for heating as a feedback resistor and a temperature compensating resistor as an input resistor, and the level is measured by the heater. At the same time as heating the level measuring resistor, a part of the level measuring resistor is immersed in liquid, and when a constant voltage is applied to the input terminal of the operational amplifier, the liquid is applied to the level measuring resistor based on the output of the operational amplifier. A heat dissipation type level sensor characterized by detecting the relative position of a surface. (2) An operational amplifier is equipped with a level measuring resistor having a heater for heating and an additional resistor as a feedback resistor, and the input resistor is a temperature compensating resistor and an additional resistor, and the level measuring resistor with the heater is used to measure the level. At the same time as heating the level measuring resistor, a part of the level measuring resistor is immersed in liquid, and when a constant voltage is applied to the input terminal of the operational amplifier, the liquid is applied to the level measuring resistor based on the output of the operational amplifier. A heat dissipation type level sensor characterized by detecting the relative position of a surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11218188U JPH0233326U (en) | 1988-08-29 | 1988-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11218188U JPH0233326U (en) | 1988-08-29 | 1988-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0233326U true JPH0233326U (en) | 1990-03-02 |
Family
ID=31350886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11218188U Pending JPH0233326U (en) | 1988-08-29 | 1988-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233326U (en) |
-
1988
- 1988-08-29 JP JP11218188U patent/JPH0233326U/ja active Pending
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