Acoustooptic indication level gauge

The utility model relates to a detector, in particular to an acousto-optic gradienter. The shell3 of the utility model is a ruler with two upwards ends with projections4. The shell3 is provided with mercury5 and a contact pin electrode10 and a contact pin electrode are respectively arranged in the projections4 of the two upwards ends of the shell3. The top part in the middle of the cavity in the shell3 is provide with a long-sheet contact pin grounding wire12 and the upper part of the shell is provided with an acousto-optic indicating circuit board6 and a battery compartment8. The top ends of the projections4 of the two ends are respectively a light emitting diode 1 and a light emitting diode 2. The circuit of the circuit board is connected by a contact pin electrode K1, a resistance R1, a dynatron BG1 and a resistance R5 to compose a left detecting circuit and a left detecting circuit is connectedly composed of a contact pin electrode K2, a resistance R2, a dynatron BG2, and a resistance R6. A luminous indicating circuit comprises a resistance R3, a resistance R4, a light emitting diode D1, and a light emitting diode D2. The utility model has the advantages of simple structure and easy use. The utility model can improve the accuracy greatly in a horizontal mensuration in all works.