Compatible with: Fit for Impact 440 540 640 740 840 Models Sprayer; Not fit for paint sprayer Replace Part Number: Replace 704-492, 704492, please confirm the model you need before buying 4-Core Design: Unique 4-core design of the sprayer sensor makes the socket fit the machine model perfectly. Made of high quality silicon and stainless steel, it has stable performance, higher sensitivity and accurate transmission performance Protection Function: The pressure sensor is connected with the pressure control system and the control box, which can close the spray booster when the spray reaches the set pressure to protect the sprayer Package Includes: 1 X Sprayer sensor, which is easy to install and can effectively monitor the running state of the sprayer Colour:As Shown Material:Metal Package Contents: 1 x Sprayer sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.