Aston GR04D024

Hi All,

Just wondering if anyone knows about or has used this sensor :

http://cgi.ebay.co.uk/Aston-GR04D024-IR-Distance-Robotic-Sensor-Cat-innova-/250731418118?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item3a60c1d206#ht_900wt_1139

Could you please let me know if this is one to avoid or not?

Thanks