CALL: A.WIHARTA 081294124885 085778084789 087784022201   Info Produk Series 2000, Indicative Positive, Negative or Differential, Accurate within 2% . Serivce for Air and non-combustible gases ( Natural Gas option available) with pressure limits : -20” HG to 15 psig ( -0.677 bar to 1.034 bar)