❄️ DP Level Control System with Bypass Vent & Temperature Display 30″ & 100″ Range
Precision Monitoring, Alarm & Automated Fill Control for Cryogenic Storage Tanks
Overview
The DP-LLC-TEMP-ALARM controller is a robust, feature-rich solution for managing liquid nitrogen levels and temperature in cryopreservation and cryogenic storage tanks. Designed for demanding lab and industrial environments, it integrates automated fill control, temperature alarms, and bypass venting to ensure safe, efficient LN₂ management.
🔧 Key Features
- Automated LN₂ Fill Control
- Adjustable high/low level set-points
- Solenoid-controlled fill with alarm-triggered shutoff
- Sequential or simultaneous fill or All fill options for multi-tank setups (SEQ/OFAF)
- Temperature Monitoring & Alarms
- Type-T thermocouple input for LID temperature monitoring / alarm
- Adjustable alarm threshold (-100°C to -180°C, default -140°C)
- Audible/visual alerts and remote relay activation
- Bypass Vent Function
- Bypass gas (Pre-fill) venting for long supply lines
- Temperature-based control (default -130°C)
- Fault detection and auto-diagnostics monitors the fill / alarm process
- User-Friendly Interface
- Backlit 16×2 LCD display
- Multifunction tactile switches
- Intuitive menu navigation with factory and user-level access and control
- Global Remote Alarm Integration
- Dry contact output (NO/NC/COM) rated at 24VDC @ 5A
- Compatible with BMS (building monitoring systems) external dialers and other alarm systems
- Analog Output for Remote Monitoring
0–5VDC signal proportional to LN₂ liquid level
- Supports both 30″ and 100″ range sensors
⚙️ Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Operating Environment |
Indoor use, 5–40°C, ≤80% RH (non-condensing) |
|
Altitude |
≤2000 m |
|
Power Supply |
100–240VAC, 50/60Hz, 1.5A max; 24VDC regulated output (2A max, 36W) |
|
Display |
STN LCD, 2×16, backlit, 64×14mm view area |
|
Thermocouples |
Type-T (Copper-Constantan), -200°C to +50°C, ±2.5°C or 1% accuracy |
|
Pressure Sensor (Level) |
Differential pressure, 0-1 psi (30″) or 0–3.63 psi (100″ range), ±1 unit resolution |
|
I/O Connections |
Fill/Vent solenoids (24VDC @ 2A), Remote Alarm (dry contact), Analog Output |
|
Calibration |
EEPROM-stored, 2-point calibration for level and temperature |
|
Alarm Timers |
Adjustable (Low: 1–60 min, High: 0–60 min, Mute: 10–60 min) |
|
Units of display |
Selectable: inches or centimeters |
🧠 Intelligent Control Logic
- Auto-fill triggers based on level thresholds
- Alarm escalation if fill process fails to reach high level within 2 hours (SOURCE ALARM)
- Bypass fault detection diagnostic with fallback to direct fill
- Defog feature for vapor clearing (1–5 min fill burst)
🔌 Connectivity & Expansion
- Daisy-chain multiple controller / tank capability for multi-unit tank control
- Configurable as PRIMARY or SECONDARY in SEQ/OFAF (Sequential Fill or One Fill All Fill) networks
- Remote monitoring via analog output and Dry contact alarm relay
MANUAL PDF: DP-LLC-TEMP-ALARM_LEVEL-CONTROL
CONTACT US FOR MORE INFORMATION