Air flow monitor RHEASGARD® KLGF-Modbus / KLGFVT-Modbus

Measured variables

Display

Inserted length

Product group: WG01

Air flow monitor RHEASREG® KLGF / KLSW

Calibratable duct air flow sensor RHEASGARD® KLGF - Modbus with Modbus connector, housing made of impact-resistant plastic with quick-locking screws, with cable gland (optional M12-connector as per DIN EN 61076-2-101) optionally with / without display, to determine the flow velocity (0.3...65 ft/s). Calibratable duct air flow sensor RHEASGARD® KLGFVT - Modbus with Modbus connector, housing made of impact-resistant plastic with quick-locking screws, with cable gland (optional M12-connector as per DIN EN 61076-2-101) optionally with/ without display, to determine the flow velocity (0.3...65 ft/s) and temperature (+32...+122 °F). The following parameters can be retrieved from the Modbus: flow velocity, volume flow (calculated) and temperature.

The flow sensors are suitable for monitoring or controlling airflows in ducts, at fans and dampers, for flow-dependent monitoring of humidifiers and electric heating registers according to DIN 57100, Sect. 420, or for use in connection with DDC systems. Innovative Modbus sensor with galvanically separated RS485 Modbus interface, selectable bus termination resistance, DIP switch for setting the bus parameters and bus address in current-free state, internal LEDs for telegram status display, two separate push-in terminals and large three-line display (illuminated; with customised programming in the 7-segment and dot-matrix range). The sensor is factory-calibrated.

Voltage supply

24 V AC/ DC (± 10 %)

Start bridging

0...120 s (can be set via Modbus)

Measuring accuracy

1.64 ft/s + 3 % measured value

Warm up time

< 2 min

Response time

< 5 s

Sensor

Calorimetric, temperature compensated, sensor breakage protection, with manual zero-point calibration (via button)

Reproducibility

± 1.0 % final value

Current consumption

approx. 4 VA

Measuring range

0.3...65 ft/s

Ambient temperature

storage –4...+ 122 °F
operation +32...+ 122 °F

Medium

pollutant-free, non-precipitating air

Bus protocol

Modbus (RTU mode),
address range 0...247 selectable

Process connection

by mounting flange
(included in the scope of delivery)

Max. sensor cable length

164 ft, avoid laying parallel with mains voltage-carrying lines,
or use shielded cables, minimum cross section AWG 16
per conductor, apply cable screen one-sided

Electrical connection

AWG 24 - 16, via push-in terminal

Cable connection

cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, max. inner diameter 0.4 in) or
M12 connector according to DIN EN 61076-2-101 (optional on request)

Housing

plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016),
housing cover for display is transparent !

Screwed socket

Housing dimensions

4.96 x 3.54 x 1,97 in (Tyr 2)

Cable gland

M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 0.4 in

Long-term stability

± 0.5 % final value per year

Humidity

< 98% RH pollutant-free, non-precipitating air

Protection class

III (according to EN 60 730)

Protection type