- Model 30 pH Transmitter 4-20: pH Measurement Range 0 to 14 pH. Single- or multiple-point calibration with auto buffer recognition. Serial Communication: None. Physical Characteristics: Two-line, 16-character, back-lit LCD display. NEMA 4X (IP65) housing, weatherproof and corrosion resistant. CE approved. Power Supply Requirements: 115/230 VAC, 50/60 Hz. - Model 40 pH Transmitter 4-20 HART: Measurement Range: 0 to 14 pH Accuracy: ± 0.01 pH Repeatability: ± 0.01 pH Stability: ± 0.01 pH/month, non-cumulative Outputs: Two 4-20 mA or 0-20 mA isolated outputs. Output 1 includes digital signal 4-20 mA superimposed HART. Digital Data Transmission Speed: 1.2 kbit/s Clear Back-lit Display: Back-lit dot matrix LCD (7.0 x 3.5 cm), blue on gray-green. The display contrast is compensated for ambient temperature. Power: 100 to 127 VAC, 50/60 Hz, 6 watts max. Dimensions: 5.7 x 5.7 x 5.2 in. DIN size (144 x 144 x 132 mm) Weight/Shipping Weight: 2.5 lb/3.5 lb (1.1 kg/1.6 kg) - Model 50 pH Transmitter Foundation Fieldbus: pH Measurement Range 0 to 14 pH Temperature Measurement Range -15 to 100º C Display Resolution ± 0.01 pH Output Repeatability ± 0.01 pH - Model 60 pH Transmitter 2-wire, 4-20, HART: pH Measurement Range 0 to 14 pH. Single- or multiple-point calibration with auto buffer recognition. Physical Characteristics: Two-line, 16-character, back-lit LCD display. NEMA 4X (IP65) housing, weatherproof and corrosion resistant. CE approved. Mounting Hardware: Available in either pipe or panel mount versions. Cable grips not included. Power Supply Requirements: 12-42 Vdc.