JLG Parts Speed Sensor. This speed sensor is used on a wide variety of JLG MEWP (Mobile Elevated Work Platforms). This speed sensor is located inside the engine bay; near the near the engine oil and fuel filter. Used primarily on Detez engine installations. Model usage includes; 400S, 460SJ,450AJ, 450S, 450A, 510AJ, 600A, 600AJ, 600S, 600SJ, 660SJ, 660SJC, 800A, 800AJ, 800S, 1100SJP, 1200SJP, 1250SJP 1250AJP, 1350SJP, 1500SJ. Please ensure proper model and serial number range before purchasing.