TRODEKS TDP400 Differential Pressure Transmitter

The TRODEKS TDP400 is a high-precision differential pressure transmitter designed for accurate measurement of very low air and gas pressure differences.

With adjustable measuring ranges, fast response characteristics and multiple analog and digital output options, the TDP400 is suitable for HVAC systems, clean rooms, medical environments, commercial buildings and other applications requiring reliable differential pressure monitoring.

The transmitter is designed for air and neutral gases and can be supplied with a backlit LCD display for clear local indication of the measured differential pressure.

Key Features

• Differential pressure ranges from -25/+25 Pa up to -10000/+10000 Pa, depending on model
• Adjustable measuring ranges using internal DIP switches
• Measurement units: Pa, mmH₂O, mmHG and mbar
• Standard accuracy: < ±1% FS at -5°C to +65°C
• Fast response time: 0.5 seconds
• Repeatability: ±0.01% FS/year
• High measurement resolution
• Manual zero-point calibration
• Backlit LCD display
• Multiple analog and digital output options
• External mounting holes for easy installation
• Configuration can be performed with the enclosure closed
• IP65 / NEMA4 housing protection
• Polycarbonate and ABS housing, UL94V-0

Measurement Ranges

TDP400-1:
0…+100 Pa
0…+75 Pa
0…+50 Pa
0…+25 Pa
-25…+25 Pa
-50…+50 Pa
-75…+75 Pa
-100…+100 Pa

TDP400-2:
0…+1000 Pa
0…+750 Pa
0…+500 Pa
0…+250 Pa
-250…+250 Pa
-500…+500 Pa
-750…+750 Pa
-1000…+1000 Pa

TDP400-3:
0…+2000 Pa
0…+1500 Pa
0…+1000 Pa
0…+500 Pa
-500…+500 Pa
-750…+750 Pa
-1500…+1500 Pa
-2000…+2000 Pa

TDP400-4:
0…+10000 Pa
0…+7500 Pa
0…+5000 Pa
0…+2500 Pa
-2500…+2500 Pa
-5000…+5000 Pa
-7500…+7500 Pa
-10000…+10000 Pa

Output Options

• 4–20 mA, 2-wire
• 4–20 mA, 3-wire
• 0–5 VDC, 3-wire
• 0–10 VDC, 3-wire
• RS-485
• Customized output options

Technical Specifications

Model: TDP400
Measurement Media: Air and neutral gases
Measurement Units: Pa, mmH₂O, mmHG, mbar
Accuracy: < ±1% FS @ -5°C to +65°C
Response Time: 0.5 s
Repeatability: ±0.01% FS/year
Resolution: 0.1 Pa / 0.1 mmH₂O / 0.01 mbar / 0.01 mmHG
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +60°C
Power Consumption: < 3 W
Tolerated Overpressure: ×15
Power Supply:
16–30 VAC/DC for 3-wire versions
18–30 VDC for 2-wire versions
Auto Zero: Manual calibration
Housing Material: Polycarbonate & ABS, UL94V-0
Protection Class: IP65 / NEMA4
Display: Backlit LCD display
Cable Gland: M16 × 1.5

Applications

The TRODEKS TDP400 is suitable for differential pressure monitoring in:

• HVAC systems
• Pharmaceutical clean rooms
• Electronic clean rooms
• Medical clean rooms
• Commercial buildings
• Public transportation hubs
• Air filter monitoring
• Ventilation and air-conditioning systems
• Room pressure monitoring

Dimensions

Approximate enclosure dimensions:
100 mm × 76.5 mm × 45 mm

The compact enclosure and external mounting holes allow fast and convenient wall installation.

Ordering Guide

Available range groups:

TDP400-1: up to ±100 Pa
TDP400-2: up to ±1000 Pa
TDP400-3: up to ±2000 Pa
TDP400-4: up to ±10000 Pa

Display option:
D – Backlit LCD Display

Output options:
E – 4–20 mA, 2-wire
F – 4–20 mA, 3-wire
G – 0–5 / 0–10 VDC, 3-wire
H – RS-485

Ordering Example:

TDP400-2-D-E

Model: TDP400 Differential Pressure Transmitter
Range: -1000…+1000 Pa
Display: Backlit LCD Display
Output: 4–20 mA, 2-wire

Optional Accessories

A pressure connection set is available as an optional accessory, including:

2 m PVC hose
2 ABS pressure connection nipples

TRODEKS TDP400 provides a compact and flexible solution for accurate differential pressure measurement where low-pressure sensitivity, multiple selectable ranges and reliable signal transmission are required.