Differential pressure transmitter MDM7000DP

piezoresistivesilicon4-20 mA

Overview
The MDM7000DP Smart Differential Pressure Transmitter is an advanced differential pressure transmitter designed for process industries. It uses monocrystalline silicon piezoresistive sensing technology and a high-strength housing to deliver high accuracy, long-term stability and strong immunity to electromagnetic interference. It supports 4 mA–20 mA DC output with HART communication and optional MODBUS RS485, and offers a maximum turndown ratio of 100:1 for flow and pressure measurement in demanding environments.

Advantages

• Monocrystalline silicon piezoresistive sensing for high precision
• Accuracy up to ±0.05% FS (range-dependent)
• High anti-interference capability with EMC protection module
• Approved for installation on pressure vessels (DNV, ABS, KR, NK, RS)
• Wide measurement range from 20 mbar to 100 bar and 100:1 turndown

Features (table)

• Accuracy: ±0.05%, ±0.075% (depending on range)
• Range: 20 mbar ~ 100 bar (see specifications for details)
• Turndown ratio: 100:1
• Long-term stability: ±0.1% Span / 10 years
• Ambient temperature effects: At 60 mbar total effect per 10°C = (0.1 + 0.05 TD)% SPAN; For other ranges total effect per 10°C = (0.075 + 0.0375 TD)% SPAN
• Voltage effects: For supply changes within 18.3 V ~ 44 V DC, zero and span change ≤ ±0.005% SPAN/V
• Mounting position effects: Less than 4 mbar at any position (can be corrected by PV=0 reset)
• Vibration effects: ≤ 0.1% SPAN per GB/T18271.3 / IEC61298-3
• Output signal: 4 mA ~ 20 mA DC, HART (option: MODBUS RS485)
• IP rating: IP67, IP66
• Weight: About 4 kg (without mounting bracket and process connection accessories)

Industry application

• Petroleum industry
• Chemical industry
• Electric power
• Steel
• Cement
• Papermaking
• Water conservancy construction

Technical specifications

• Model: MDM7000DP
• Sensing technology: Monocrystalline silicon piezoresistive
• Accuracy: ±0.05% FS; ±0.075% (dependent on range)
• Measuring range: 20 mbar ~ 100 bar
• Turndown ratio: 100:1
• Long-term stability: ±0.1% Span / 10 years
• Ambient temperature effect: See feature table (per 10°C formulas)
• Supply voltage range: 18.3 V ~ 44 V DC (voltage effect ≤ ±0.005% SPAN/V)
• Output: 4 mA~20 mA DC, HART (MODBUS RS485 supported)
• EMC protection: High-performance EMC protection circuit module
• Ingress protection: IP67 / IP66
• Approximate weight: 4 kg (without brackets/accessories)
• Note: Achievable accuracy depends on selected range