K-22?¶Ã. HART Filter. 1-channel. Parallel connection to HART loop. Filters HART signal from control loop. Resistant to microbes and hydrolysis. Oil resistant. Halogen-free. Lower cost - prevents legacy tag replacement. Ideal for intensive scanning and 12 hour shifts. For connection to IDENTControl evaluation unit. Up to SIL 3 acc. to IEC/EN 61508