Home / Accessories / A&D Instruments Accessories / A&D Comparator Relay Output, Buzzer, External Key Input Interface A&D Comparator Relay Output, Buzzer, External Key Input Interface Brand: A&D  |  Product Code: GXA-04  |   In stock £248.00 £297.60 (inc. VAT) £276.00 You save £28.00 Order by 3pm, get it tomorrow! Favourite This Description Comparator Relay Output, Buzzer, External Key Input Interface