Type A-04 Chart Recorder

Part # 93504

type a chart recorder

The Stevens Type A-04 Chart Recorder is the world’s most time-proven standard in quality and reliability where continuous, long-term water level measurement operations are required. Over 40,000 Stevens Chart Recorders have been installed and used both as primary and backup instrument for a true real-time water level record. Flow data may also be obtained when it is used with weirs, flumes or where water level is an index of flow.

The Type A-04 chart recorder can be easily integrated with electronic data loggers. The Stevens A/F (quadrature) Encoder or SDI-12 Encoder can easily be attached directly to the Type A-04. The design of the encoders eliminates any concern over excess torque that may occur with an external sprocket chain driving an encoder. Stevens’ directly attached encoders provide an electronic signal of level for a data logger and/or telemetry modem communications.

  • Long-term, unattended operation
  • Low power
  • True real-time, continuous water level measurement
  • Time-proven reliability


Technical Specifications

Chart drive options

Quartz Multispeed Timer (6 month battery)

Operating temperature

  • -20 ºF to +160 ºF (QMT with 6 alkaline D cells)
  • -40 ºF to +160º F (with lead acid battery)

Height

  • 11 in. (279.4 mm) with cover closed
  • 9.5 in. (241.3 mm) with cover off

Length

23.125 in. (612.7 mm)

Width

11 in. (279.4 mm)

Weight

25 lbs (11.33 kg) approx.

Time scale and chart paper life table


Inches (cm) per day
Major Division
0.1 in. (0.25 cm)
Major Division
1.2 in. (3.0 cm)

Chart Life
0.6 (1.5) 48 hours 4 hours 4 years
1.2 (3.0) 24 hours 2 hours 2 years
2.4 (6.1) 12 hours 1 hour 1 year
4.8 (12.2) 6 hours 30 minutes 6 months
9.6 (24.4) 3 hours 15 minutes 3 months
19.2 (48.8) 1.5 hours 7.5 minutes 1.5 months
38.4 (97.5) 45 minutes 3.75 minutes 22.5 days