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Citrex H4

Citrex H4

The most precise gas flow and pressure test instrument for mobile use.

- Analyze the performance of a wide variety of medical devices
- Bidirectional flow measurement
- Respiratory parameters in real-time graphs
- Oxygen measurement
- Comes with full accessories set

CITREX H4 Gas Flow Analyzer

The test tool of choice for healthcare quality and safety professionals.

CITREX H4 is designed for mobile and easy use while still meeting all requirements of day-to-day field operations. Its capabilities allows it to analyze the performance of a wide variety of medical devices. Examples of gas flow or pressure producing devices are: respiratory ventilators, endoscopic insufflators, anesthetic machines, oxygen flow meters, pressure gauges and suction devices.

The CITREX mobile test set is a certified, high precision measuring system with an extensive set of accessories.

Bidirectional flow measurement allows extremely precise, bidirectional flow, volume and pressure measurement with low measuring resistance.

The H4 has up to 25 relevant respiratory parameters based on volume, flow and pressure are continuously measured and calculated and can be easily displayed on the color screen in real-time.

Watch the CITREX H4 video below

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Optional Accessories

Technical Specifications

Flow and Pressure Measurements
Flow±300 sL/min*** ±1.9 %* or ±0.1 L/min (for 10..40°C)**
Measuring bidirectionalyes
Temperature compensatedautomatic
Pressure compensatedautomatic
Humidity compensatedmanually
FlowL/min, L/s, cfm, mL/min, mL/s
Pressurebar, mbar, cmH2O, inH2O, Torr, inHg, hPa, kPa, mmHg, PSI
Ventilation parameter
Breath rate1–1000 bpm ±1 bpm* or ±2.5 %**
Time0.05–60 s ±0.02 s
Ratio1:300–300:1 ±2.5 %*
Ti/Tcyc0–100 % ±5 %*
Breath volume±2 %* or ±0.20 mL (>6 sL/min)**
Tidal volume±10 L ±2 %* or ±0.20 mL (>6 sL/min)**
Minute volume0–300 sL/min ±2.5 %*
Peak flow± 300 sL/min ±1.9 %* or ±0.1 sL/min**
Pressure0–150 mbar ±0.75 %* or ±0.1 mbar**
Compliance0–1000 mL/mbar ±3 %* or ±1 mL/mbar**
The greater tolerance is valid: * Tolerance related to the measured value, ** Absolute tolerance, *** The unit sL/min is based on ambient conditions of 0 °C and 1013.25 mbar (DIN 1343).
High0–10 bar ±1 %* or ±10 mbar**
Differential±200 mbar ±0.75 %* or ±0.1 mbar**
Flow channel-50–150 mbar ±0.75 %* or ±0.1 mbar**
Atmospheric pressure500–1150 mbar ±1 %* oder ±5 mbar**
Other measurements
Oxygen (pressure comp. ≤ 150 mbar)0–100 % ±1 % O2**
Gas temperature0–50°C ±1.75 %* or ±0.5 °C**
Gas typesAir, Air/O2, O2, N2O, N2O/O2, CO2, N2, He/O2
Gas standardsATP, ATPD, ATPS, AP21, STP, STPH, BTPS, BTPS-A, BTPD, BTPD-A, 0/1013, 20/981, 15/1013, 25/991, 20/1013, NTPD, NTPS
General information
Realtime curvesyes
Display1.7'' with touch control elements (color)
InterfaceRS-232, USB, Ethernet, CAN, Analog Out, TTL, TSI4000 Protocol
Data storagemicroSD Card
Power100–240 VAC, 50–60 Hz
Dimension (w x d x h)11.4 x 7 x 6 cm
Weight0.4 kg
Battery4 hours
ApprovalsCE, BC (Energy Efficiency for Battery Charging Systems), CSA (North America), IEC 61010-1:2010, IEC 61326-2:2012


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