Bristol Babcock Inc. Signature Differential Pressure Transmitter. Model: 2408-30B. S/N: 85H-15902. Cal: 0-100 IN/WTR, LRL: 20 IN/WTR, URL: 120 IN/WTR. Maximum working pressure: 2000 psi. Fill: DC 200. Bristol’s transmitters have been designed primarily for use in remote, field applications, which require accurate measurement, very low power consumption and rugged packaging. Overall dimensions: 5-1/4 in. L x 4-3/4 in. W x 9-1/2 in. H.