Ergometer exercise bike 939 Upright

Summary
The Monark 939 Upright is a clinical diagnostic upright ergometer designed for reproducible, traceable workload delivery in ECG and CPET workflows. It uses Monark's Electronic Pendulum System (EPS) to provide precise control in both constant power and constant force modes.

Key features

• EPS electronic resistance with constant power and constant force options
• Electronic calibration via Monark Novo Duo and mechanical calibration with a 4 kg calibrated weight
• Monochrome Monark Novo Duo touchscreen displaying RPM, time, speed, distance, watt/kp and heart rate (ANT+ chest belt)
• Wired (RS232, USB-B) and wireless (BLE FTMS, ANT+ FE-C) connectivity for integration with diagnostic systems
• Low step-through upright frame with wide adjustability for consistent patient positioning

Use

• ECG stress testing requiring controlled and traceable workload
• CPET in clinical settings together with metabolic measurement systems
• Longitudinal follow-up where comparable, calibrated results are required
• Occupational medicine assessments with defined workload levels
• Clinical fitness assessment using protocols such as Åstrand, YMCA and Ekblom-Bak via Monark software
• Standardized clinical test environments demanding consistent user position and documentation

Resistance and calibration
EPS (Electronic Pendulum System) providing electronic control of resistance
Electronic calibration through Novo Duo; mechanical calibration using a 4 kg calibrated weight
Flywheel mass: 20 kg
Supports constant power (fixed watt output regardless of cadence) and constant force (fixed resistance in kp regardless of cadence)

Display and measurement
Monark Novo Duo monochrome touchscreen displaying RPM, time, speed, distance, watt/kp and heart rate (via ANT+ chest belt)

Connectivity
Wired: RS232 and USB-B (max 3 m)
Wireless: BLE (FTMS), ANT+ (FE-C)
Adapted for integration into CPET and ECG workflows and diagnostic systems

Frame and ergonomics
Monark upright low step-through frame
Adjustable Monark upright handlebar and seatpost
Wide soft saddle for stable positioning
Bottom bracket: 68/122 mm
Crank: steel, 170 mm
Pedals: 9/16” with foot straps
Covers: high-quality recycled plastic

Power requirements
220 V via adapter; adapter output 12 V, 5.0 A

Specifications

• Model: Monark 939 Upright (diagnostic ergometer)
• Workload system: EPS (Electronic Pendulum System)
• Calibration: Electronic via Novo Duo; mechanical with 4 kg calibrated weight
• Flywheel: 20 kg
• Display: Monark Novo Duo, monochrome touchscreen (RPM, time, speed, distance, watt/kp, heart rate via ANT+)
• Connectivity wired: RS232, USB-B (max 3 m)
• Connectivity wireless: BLE (FTMS), ANT+ (FE-C)
• System integration: adapted for CPET and ECG environments
• Frame type: Monark upright low step-through frame
• Handlebar: adjustable Monark upright handlebar
• Seatpost: adjustable Monark upright seatpost
• Saddle: wide soft saddle
• Bottom bracket (BB): 68/122 mm
• Crank: steel, 170 mm
• Pedals: 9/16” with foot straps
• Covers: high-quality recycled plastic
• Max user weight: 180 kg
• Recommended user height: >150 cm
• Dimensions (L×W×H): 1240 mm × 520 mm × 1100 mm
• Weight (device): 64 kg
• Power: 220 V via adapter, adapter output 12 V, 5.0 A